* <td>Asks a confirming question, like yes/no/cancel. * </tr> * <tr> * <td>showInputDialog * <td>Prompt for some input. * </tr> * <tr> * <td>showMessageDialog * <td>Tell the user about something that has happened. * </tr> * <tr> * <td>showOptionDialog * <td>The Grand Unification of the above three. * </tr> * </table> * * </blockquote> * Each of these methods also comes in a <code>showInternalXXX * flavor, which uses an internal frame to hold the dialog box (see * {@link JInternalFrame}). * Multiple convenience methods have also been defined -- overloaded * versions of the basic methods that use different parameter lists. * <p> * All dialogs are modal. Each <code>showXxxDialog method blocks * the caller until the user's interaction is complete. * * <table cellspacing=6 cellpadding=4 border=0 style="float:right" summary="layout"> * <tr> * <td style="background-color:#FFe0d0" rowspan=2>icon * <td style="background-color:#FFe0d0">message * </tr> * <tr> * <td style="background-color:#FFe0d0">input value * </tr> * <tr> * <td style="background-color:#FFe0d0" colspan=2>option buttons * </tr> * </table> * * The basic appearance of one of these dialog boxes is generally * similar to the picture at the right, although the various * look-and-feels are * ultimately responsible for the final result. In particular, the * look-and-feels will adjust the layout to accommodate the option pane's * <code>ComponentOrientation property. * <br style="clear:all"> * <p> * <b>Parameters:
* The parameters to these methods follow consistent patterns: * <blockquote> * <dl compact> * <dt>parentComponent

* Defines the <code>Component that is to be the parent of this * dialog box. * It is used in two ways: the <code>Frame that contains * it is used as the <code>Frame * parent for the dialog box, and its screen coordinates are used in * the placement of the dialog box. In general, the dialog box is placed * just below the component. This parameter may be <code>null, * in which case a default <code>Frame is used as the parent, * and the dialog will be * centered on the screen (depending on the {@literal L&F}). * <dt>message

* A descriptive message to be placed in the dialog box. * In the most common usage, message is just a <code>String or * <code>String constant. * However, the type of this parameter is actually <code>Object. Its * interpretation depends on its type: * <dl compact> * <dt>Object[]

An array of objects is interpreted as a series of * messages (one per object) arranged in a vertical stack. * The interpretation is recursive -- each object in the * array is interpreted according to its type. * <dt>Component

The Component is displayed in the dialog. * <dt>Icon

The Icon is wrapped in a JLabel * and displayed in the dialog. * <dt>others

The object is converted to a String by calling * its <code>toString method. The result is wrapped in a * <code>JLabel and displayed. * </dl> * <dt>messageType

Defines the style of the message. The Look and Feel * manager may lay out the dialog differently depending on this value, and * will often provide a default icon. The possible values are: * <ul> * <li>ERROR_MESSAGE * <li>INFORMATION_MESSAGE * <li>WARNING_MESSAGE * <li>QUESTION_MESSAGE * <li>PLAIN_MESSAGE * </ul> * <dt>optionType

Defines the set of option buttons that appear at * the bottom of the dialog box: * <ul> * <li>DEFAULT_OPTION * <li>YES_NO_OPTION * <li>YES_NO_CANCEL_OPTION * <li>OK_CANCEL_OPTION * </ul> * You aren't limited to this set of option buttons. You can provide any * buttons you want using the options parameter. * <dt>options

A more detailed description of the set of option buttons * that will appear at the bottom of the dialog box. * The usual value for the options parameter is an array of * <code>Strings. But * the parameter type is an array of <code>Objects. * A button is created for each object depending on its type: * <dl compact> * <dt>Component

The component is added to the button row directly. * <dt>Icon

A JButton is created with this as its label. * <dt>other

The Object is converted to a string using its * <code>toString method and the result is used to * label a <code>JButton. * </dl> * <dt>icon

A decorative icon to be placed in the dialog box. A default * value for this is determined by the <code>messageType parameter. * <dt>title

The title for the dialog box. * <dt>initialValue

The default selection (input value). * </dl> * </blockquote> * <p> * When the selection is changed, <code>setValue is invoked, * which generates a <code>PropertyChangeEvent. * <p> * If a <code>JOptionPane has configured to all input * <code>setWantsInput * the bound property <code>JOptionPane.INPUT_VALUE_PROPERTY * can also be listened * to, to determine when the user has input or selected a value. * <p> * When one of the <code>showXxxDialog methods returns an integer, * the possible values are: * <ul> * <li>YES_OPTION * <li>NO_OPTION * <li>CANCEL_OPTION * <li>OK_OPTION * <li>CLOSED_OPTION * </ul> * <b>Examples: * <dl> * <dt>Show an error dialog that displays the message, 'alert': * <dd>


 * JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);
 * </code>
 * <dt>Show an internal information dialog with the message, 'information':
 * <dd>

 * JOptionPane.showInternalMessageDialog(frame, "information",
 *             "information", JOptionPane.INFORMATION_MESSAGE);
 * </pre>
 * <dt>Show an information panel with the options yes/no and message 'choose one':
 * <dd>JOptionPane.showConfirmDialog(null,
 *             "choose one", "choose one", JOptionPane.YES_NO_OPTION);
 * </pre>
 * <dt>Show an internal information dialog with the options yes/no/cancel and
 * message 'please choose one' and title information:
 * <dd>JOptionPane.showInternalConfirmDialog(frame,
 *             "please choose one", "information",
 *             JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);
 * </pre>
 * <dt>Show a warning dialog with the options OK, CANCEL, title 'Warning', and
 * message 'Click OK to continue':
 * <dd> * Object[] options = { "OK", "CANCEL" };
 * JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning",
 *             JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
 *             null, options, options[0]);
 * </pre>
 * <dt>Show a dialog asking the user to type in a String:
 * <dd>
 * String inputValue = JOptionPane.showInputDialog("Please input a value");
 * </code>
 * <dt>Show a dialog asking the user to select a String:
 * <dd> * Object[] possibleValues = { "First", "Second", "Third" };<br>
 * Object selectedValue = JOptionPane.showInputDialog(null,
 *             "Choose one", "Input",
 *             JOptionPane.INFORMATION_MESSAGE, null,
 *             possibleValues, possibleValues[0]);
 * </pre>
 * </dl>
 * <b>Direct Use:

 * To create and use an <code>JOptionPane directly, the
 * standard pattern is roughly as follows:
 * <pre>
 *     JOptionPane pane = new JOptionPane(<i>arguments);
 *     pane.set<i>.Xxxx(...); // Configure
 *     JDialog dialog = pane.createDialog(<i>parentComponent, title);
 *     dialog.show();
 *     Object selectedValue = pane.getValue();
 *     if(selectedValue == null)
 *       return CLOSED_OPTION;
 *     <i>//If there is not an array of option buttons:
 *     if(options == null) {
 *       if(selectedValue instanceof Integer)
 *          return ((Integer)selectedValue).intValue();
 *       return CLOSED_OPTION;
 *     }
 *     <i>//If there is an array of option buttons:
 *     for(int counter = 0, maxCounter = options.length;
 *        counter < maxCounter; counter++) {
 *        if(options[counter].equals(selectedValue))
 *        return counter;
 *     }
 *     return CLOSED_OPTION;
 * </pre>
 * <p>
 * <strong>Warning: Swing is not thread safe. For more
 * information see <a
 * href="package-summary.html#threading">Swing's Threading
 * Policy</a>.
 * <p>
 * <strong>Warning:
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans™
 * has been added to the <code>java.beans package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @see JInternalFrame
 *
 * @beaninfo
 *      attribute: isContainer true
 *    description: A component which implements standard dialog box controls.
 *
 * @author James Gosling
 * @author Scott Violet
 */
public class JOptionPane extends JComponent implements Accessible
{
    /**
     * @see #getUIClassID
     * @see #readObject
     */
    private static final String uiClassID = "OptionPaneUI";

    /**
     * Indicates that the user has not yet selected a value.
     */
    public static final Object      UNINITIALIZED_VALUE = "uninitializedValue";

    //
    // Option types
    //

    /**
     * Type meaning Look and Feel should not supply any options -- only
     * use the options from the <code>JOptionPane.
     */
    public static final int         DEFAULT_OPTION = -1;
    /** Type used for <code>showConfirmDialog. */
    public static final int         YES_NO_OPTION = 0;
    /** Type used for <code>showConfirmDialog. */
    public static final int         YES_NO_CANCEL_OPTION = 1;
    /** Type used for <code>showConfirmDialog. */
    public static final int         OK_CANCEL_OPTION = 2;

    //
    // Return values.
    //
    /** Return value from class method if YES is chosen. */
    public static final int         YES_OPTION = 0;
    /** Return value from class method if NO is chosen. */
    public static final int         NO_OPTION = 1;
    /** Return value from class method if CANCEL is chosen. */
    public static final int         CANCEL_OPTION = 2;
    /** Return value form class method if OK is chosen. */
    public static final int         OK_OPTION = 0;
    /** Return value from class method if user closes window without selecting
     * anything, more than likely this should be treated as either a
     * <code>CANCEL_OPTION or NO_OPTION. */
    public static final int         CLOSED_OPTION = -1;

    //
    // Message types. Used by the UI to determine what icon to display,
    // and possibly what behavior to give based on the type.
    //
    /** Used for error messages. */
    public static final int  ERROR_MESSAGE = 0;
    /** Used for information messages. */
    public static final int  INFORMATION_MESSAGE = 1;
    /** Used for warning messages. */
    public static final int  WARNING_MESSAGE = 2;
    /** Used for questions. */
    public static final int  QUESTION_MESSAGE = 3;
    /** No icon is used. */
    public static final int   PLAIN_MESSAGE = -1;

    /** Bound property name for <code>icon. */
    public static final String      ICON_PROPERTY = "icon";
    /** Bound property name for <code>message. */
    public static final String      MESSAGE_PROPERTY = "message";
    /** Bound property name for <code>value. */
    public static final String      VALUE_PROPERTY = "value";
    /** Bound property name for <code>option. */
    public static final String      OPTIONS_PROPERTY = "options";
    /** Bound property name for <code>initialValue. */
    public static final String      INITIAL_VALUE_PROPERTY = "initialValue";
    /** Bound property name for <code>type. */
    public static final String      MESSAGE_TYPE_PROPERTY = "messageType";
    /** Bound property name for <code>optionType. */
    public static final String      OPTION_TYPE_PROPERTY = "optionType";
    /** Bound property name for <code>selectionValues. */
    public static final String      SELECTION_VALUES_PROPERTY = "selectionValues";
    /** Bound property name for <code>initialSelectionValue. */
    public static final String      INITIAL_SELECTION_VALUE_PROPERTY = "initialSelectionValue";
    /** Bound property name for <code>inputValue. */
    public static final String      INPUT_VALUE_PROPERTY = "inputValue";
    /** Bound property name for <code>wantsInput. */
    public static final String      WANTS_INPUT_PROPERTY = "wantsInput";

    /** Icon used in pane. */
    transient protected Icon                  icon;
    /** Message to display. */
    transient protected Object                message;
    /** Options to display to the user. */
    transient protected Object[]              options;
    /** Value that should be initially selected in <code>options. */
    transient protected Object                initialValue;
    /** Message type. */
    protected int                   messageType;
    /**
     * Option type, one of <code>DEFAULT_OPTION,
     * <code>YES_NO_OPTION,
     * <code>YES_NO_CANCEL_OPTION or
     * <code>OK_CANCEL_OPTION.
     */
    protected int                   optionType;
    /** Currently selected value, will be a valid option, or
     * <code>UNINITIALIZED_VALUE or null. */
    transient protected Object                value;
    /** Array of values the user can choose from. Look and feel will
     * provide the UI component to choose this from. */
    protected transient Object[]              selectionValues;
    /** Value the user has input. */
    protected transient Object                inputValue;
    /** Initial value to select in <code>selectionValues. */
    protected transient Object                initialSelectionValue;
    /** If true, a UI widget will be provided to the user to get input. */
    protected boolean                         wantsInput;


    /**
     * Shows a question-message dialog requesting input from the user. The
     * dialog uses the default frame, which usually means it is centered on
     * the screen.
     *
     * @param message the <code>Object to display
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Object message)
        throws HeadlessException {
        return showInputDialog(null, message);
    }

    /**
     * Shows a question-message dialog requesting input from the user, with
     * the input value initialized to <code>initialSelectionValue. The
     * dialog uses the default frame, which usually means it is centered on
     * the screen.
     *
     * @param message the <code>Object to display
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @since 1.4
     */
    public static String showInputDialog(Object message, Object initialSelectionValue) {
        return showInputDialog(null, message, initialSelectionValue);
    }

    /**
     * Shows a question-message dialog requesting input from the user
     * parented to <code>parentComponent.
     * The dialog is displayed on top of the <code>Component's
     * frame, and is usually positioned below the <code>Component.
     *
     * @param parentComponent  the parent <code>Component for the
     *          dialog
     * @param message  the <code>Object to display
     * @exception HeadlessException if
     *    <code>GraphicsEnvironment.isHeadless returns
     *    <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Component parentComponent,
        Object message) throws HeadlessException {
        return showInputDialog(parentComponent, message, UIManager.getString(
            "OptionPane.inputDialogTitle", parentComponent), QUESTION_MESSAGE);
    }

    /**
     * Shows a question-message dialog requesting input from the user and
     * parented to <code>parentComponent. The input value will be
     * initialized to <code>initialSelectionValue.
     * The dialog is displayed on top of the <code>Component's
     * frame, and is usually positioned below the <code>Component.
     *
     * @param parentComponent  the parent <code>Component for the
     *          dialog
     * @param message the <code>Object to display
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @since 1.4
     */
    public static String showInputDialog(Component parentComponent, Object message,
                                         Object initialSelectionValue) {
        return (String)showInputDialog(parentComponent, message,
                      UIManager.getString("OptionPane.inputDialogTitle",
                      parentComponent), QUESTION_MESSAGE, null, null,
                      initialSelectionValue);
    }

    /**
     * Shows a dialog requesting input from the user parented to
     * <code>parentComponent with the dialog having the title
     * <code>title and message type messageType.
     *
     * @param parentComponent  the parent <code>Component for the
     *                  dialog
     * @param message  the <code>Object to display
     * @param title    the <code>String to display in the dialog
     *                  title bar
     * @param messageType the type of message that is to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Component parentComponent,
        Object message, String title, int messageType)
        throws HeadlessException {
        return (String)showInputDialog(parentComponent, message, title,
                                       messageType, null, null, null);
    }

    /**
     * Prompts the user for input in a blocking dialog where the
     * initial selection, possible selections, and all other options can
     * be specified. The user will able to choose from
     * <code>selectionValues, where null implies the
     * user can input
     * whatever they wish, usually by means of a <code>JTextField.
     * <code>initialSelectionValue is the initial value to prompt
     * the user with. It is up to the UI to decide how best to represent
     * the <code>selectionValues, but usually a
     * <code>JComboBox, JList, or
     * <code>JTextField will be used.
     *
     * @param parentComponent  the parent <code>Component for the
     *                  dialog
     * @param message  the <code>Object to display
     * @param title    the <code>String to display in the
     *                  dialog title bar
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param icon     the <code>Icon image to display
     * @param selectionValues an array of <code>Objects that
     *                  gives the possible selections
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @return user's input, or <code>null meaning the user
     *                  canceled the input
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Object showInputDialog(Component parentComponent,
        Object message, String title, int messageType, Icon icon,
        Object[] selectionValues, Object initialSelectionValue)
        throws HeadlessException {
        JOptionPane    pane = new JOptionPane(message, messageType,
                                              OK_CANCEL_OPTION, icon,
                                              null, null);

        pane.setWantsInput(true);
        pane.setSelectionValues(selectionValues);
        pane.setInitialSelectionValue(initialSelectionValue);
        pane.setComponentOrientation(((parentComponent == null) ?
            getRootFrame() : parentComponent).getComponentOrientation());

        int style = styleFromMessageType(messageType);
        JDialog dialog = pane.createDialog(parentComponent, title, style);

        pane.selectInitialValue();
        dialog.show();
        dialog.dispose();

        Object value = pane.getInputValue();

        if (value == UNINITIALIZED_VALUE) {
            return null;
        }
        return value;
    }

    /**
     * Brings up an information-message dialog titled "Message".
     *
     * @param parentComponent determines the <code>Frame in
     *          which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the <code>Object to display
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message) throws HeadlessException {
        showMessageDialog(parentComponent, message, UIManager.getString(
                    "OptionPane.messageDialogTitle", parentComponent),
                    INFORMATION_MESSAGE);
    }

    /**
     * Brings up a dialog that displays a message using a default
     * icon determined by the <code>messageType parameter.
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message, String title, int messageType)
        throws HeadlessException {
        showMessageDialog(parentComponent, message, title, messageType, null);
    }

    /**
     * Brings up a dialog displaying a message, specifying all parameters.
     *
     * @param parentComponent determines the <code>Frame in which the
     *                  dialog is displayed; if <code>null,
     *                  or if the <code>parentComponent has no
     *                  <code>Frame, a
     *                  default <code>Frame is used
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param icon      an icon to display in the dialog that helps the user
     *                  identify the kind of message that is being displayed
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message, String title, int messageType, Icon icon)
        throws HeadlessException {
        showOptionDialog(parentComponent, message, title, DEFAULT_OPTION,
                         messageType, icon, null, null);
    }

    /**
     * Brings up a dialog with the options <i>Yes,
     * <i>No and Cancel; with the
     * title, <b>Select an Option.
     *
     * @param parentComponent determines the <code>Frame in which the
     *                  dialog is displayed; if <code>null,
     *                  or if the <code>parentComponent has no
     *                  <code>Frame, a
     *                  default <code>Frame is used
     * @param message   the <code>Object to display
     * @return an integer indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message) throws HeadlessException {
        return showConfirmDialog(parentComponent, message,
                                 UIManager.getString("OptionPane.titleText"),
                                 YES_NO_CANCEL_OPTION);
    }

    /**
     * Brings up a dialog where the number of choices is determined
     * by the <code>optionType parameter.
     *
     * @param parentComponent determines the <code>Frame in which the
     *                  dialog is displayed; if <code>null,
     *                  or if the <code>parentComponent has no
     *                  <code>Frame, a
     *                  default <code>Frame is used
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param optionType an int designating the options available on the dialog:
     *                  <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  or <code>OK_CANCEL_OPTION
     * @return an int indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType)
        throws HeadlessException {
        return showConfirmDialog(parentComponent, message, title, optionType,
                                 QUESTION_MESSAGE);
    }

    /**
     * Brings up a dialog where the number of choices is determined
     * by the <code>optionType parameter, where the
     * <code>messageType
     * parameter determines the icon to display.
     * The <code>messageType parameter is primarily used to supply
     * a default icon from the Look and Feel.
     *
     * @param parentComponent determines the <code>Frame in
     *                  which the dialog is displayed; if <code>null,
     *                  or if the <code>parentComponent has no
     *                  <code>Frame, a
     *                  default <code>Frame is used.
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *                   on the dialog: <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  or <code>OK_CANCEL_OPTION
     * @param messageType an integer designating the kind of message this is;
     *                  primarily used to determine the icon from the pluggable
     *                  Look and Feel: <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @return an integer indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType, int messageType)
        throws HeadlessException {
        return showConfirmDialog(parentComponent, message, title, optionType,
                                messageType, null);
    }

    /**
     * Brings up a dialog with a specified icon, where the number of
     * choices is determined by the <code>optionType parameter.
     * The <code>messageType parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame in which the
     *                  dialog is displayed; if <code>null,
     *                  or if the <code>parentComponent has no
     *                  <code>Frame, a
     *                  default <code>Frame is used
     * @param message   the Object to display
     * @param title     the title string for the dialog
     * @param optionType an int designating the options available on the dialog:
     *                  <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  or <code>OK_CANCEL_OPTION
     * @param messageType an int designating the kind of message this is,
     *                  primarily used to determine the icon from the pluggable
     *                  Look and Feel: <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param icon      the icon to display in the dialog
     * @return an int indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType,
        int messageType, Icon icon) throws HeadlessException {
        return showOptionDialog(parentComponent, message, title, optionType,
                                messageType, icon, null, null);
    }

    /**
     * Brings up a dialog with a specified icon, where the initial
     * choice is determined by the <code>initialValue parameter and
     * the number of choices is determined by the <code>optionType
     * parameter.
     * <p>
     * If <code>optionType is YES_NO_OPTION,
     * or <code>YES_NO_CANCEL_OPTION
     * and the <code>options parameter is null,
     * then the options are
     * supplied by the look and feel.
     * <p>
     * The <code>messageType parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame
     *                  in which the dialog is displayed;  if
     *                  <code>null, or if the
     *                  <code>parentComponent has no
     *                  <code>Frame, a
     *                  default <code>Frame is used
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available on the
     *                  dialog: <code>DEFAULT_OPTION,
     *                  <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  or <code>OK_CANCEL_OPTION
     * @param messageType an integer designating the kind of message this is,
     *                  primarily used to determine the icon from the
     *                  pluggable Look and Feel: <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param icon      the icon to display in the dialog
     * @param options   an array of objects indicating the possible choices
     *                  the user can make; if the objects are components, they
     *                  are rendered properly; non-<code>String
     *                  objects are
     *                  rendered using their <code>toString methods;
     *                  if this parameter is <code>null,
     *                  the options are determined by the Look and Feel
     * @param initialValue the object that represents the default selection
     *                  for the dialog; only meaningful if <code>options
     *                  is used; can be <code>null
     * @return an integer indicating the option chosen by the user,
     *                  or <code>CLOSED_OPTION if the user closed
     *                  the dialog
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showOptionDialog(Component parentComponent,
        Object message, String title, int optionType, int messageType,
        Icon icon, Object[] options, Object initialValue)
        throws HeadlessException {
        JOptionPane             pane = new JOptionPane(message, messageType,
                                                       optionType, icon,
                                                       options, initialValue);

        pane.setInitialValue(initialValue);
        pane.setComponentOrientation(((parentComponent == null) ?
            getRootFrame() : parentComponent).getComponentOrientation());

        int style = styleFromMessageType(messageType);
        JDialog dialog = pane.createDialog(parentComponent, title, style);

        pane.selectInitialValue();
        dialog.show();
        dialog.dispose();

        Object        selectedValue = pane.getValue();

        if(selectedValue == null)
            return CLOSED_OPTION;
        if(options == null) {
            if(selectedValue instanceof Integer)
                return ((Integer)selectedValue).intValue();
            return CLOSED_OPTION;
        }
        for(int counter = 0, maxCounter = options.length;
            counter < maxCounter; counter++) {
            if(options[counter].equals(selectedValue))
                return counter;
        }
        return CLOSED_OPTION;
    }

    /**
     * Creates and returns a new <code>JDialog wrapping
     * <code>this centered on the parentComponent
     * in the <code>parentComponent's frame.
     * <code>title is the title of the returned dialog.
     * The returned <code>JDialog will not be resizable by the
     * user, however programs can invoke <code>setResizable on
     * the <code>JDialog instance to change this property.
     * The returned <code>JDialog will be set up such that
     * once it is closed, or the user clicks on one of the buttons,
     * the optionpane's value property will be set accordingly and
     * the dialog will be closed.  Each time the dialog is made visible,
     * it will reset the option pane's value property to
     * <code>JOptionPane.UNINITIALIZED_VALUE to ensure the
     * user's subsequent action closes the dialog properly.
     *
     * @param parentComponent determines the frame in which the dialog
     *          is displayed; if the <code>parentComponent has
     *          no <code>Frame, a default Frame is used
     * @param title     the title string for the dialog
     * @return a new <code>JDialog containing this instance
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public JDialog createDialog(Component parentComponent, String title)
        throws HeadlessException {
        int style = styleFromMessageType(getMessageType());
        return createDialog(parentComponent, title, style);
    }

    /**
     * Creates and returns a new parentless <code>JDialog
     * with the specified title.
     * The returned <code>JDialog will not be resizable by the
     * user, however programs can invoke <code>setResizable on
     * the <code>JDialog instance to change this property.
     * The returned <code>JDialog will be set up such that
     * once it is closed, or the user clicks on one of the buttons,
     * the optionpane's value property will be set accordingly and
     * the dialog will be closed.  Each time the dialog is made visible,
     * it will reset the option pane's value property to
     * <code>JOptionPane.UNINITIALIZED_VALUE to ensure the
     * user's subsequent action closes the dialog properly.
     *
     * @param title     the title string for the dialog
     * @return a new <code>JDialog containing this instance
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @since 1.6
     */
    public JDialog createDialog(String title) throws HeadlessException {
        int style = styleFromMessageType(getMessageType());
        JDialog dialog = new JDialog((Dialog) null, title, true);
        initDialog(dialog, style, null);
        return dialog;
    }

    private JDialog createDialog(Component parentComponent, String title,
            int style)
            throws HeadlessException {

        final JDialog dialog;

        Window window = JOptionPane.getWindowForComponent(parentComponent);
        if (window instanceof Frame) {
            dialog = new JDialog((Frame)window, title, true);
        } else {
            dialog = new JDialog((Dialog)window, title, true);
        }
        if (window instanceof SwingUtilities.SharedOwnerFrame) {
            WindowListener ownerShutdownListener =
                    SwingUtilities.getSharedOwnerFrameShutdownListener();
            dialog.addWindowListener(ownerShutdownListener);
        }
        initDialog(dialog, style, parentComponent);
        return dialog;
    }

    private void initDialog(final JDialog dialog, int style, Component parentComponent) {
        dialog.setComponentOrientation(this.getComponentOrientation());
        Container contentPane = dialog.getContentPane();

        contentPane.setLayout(new BorderLayout());
        contentPane.add(this, BorderLayout.CENTER);
        dialog.setResizable(false);
        if (JDialog.isDefaultLookAndFeelDecorated()) {
            boolean supportsWindowDecorations =
              UIManager.getLookAndFeel().getSupportsWindowDecorations();
            if (supportsWindowDecorations) {
                dialog.setUndecorated(true);
                getRootPane().setWindowDecorationStyle(style);
            }
        }
        dialog.pack();
        dialog.setLocationRelativeTo(parentComponent);

        final PropertyChangeListener listener = new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                // Let the defaultCloseOperation handle the closing
                // if the user closed the window without selecting a button
                // (newValue = null in that case).  Otherwise, close the dialog.
                if (dialog.isVisible() && event.getSource() == JOptionPane.this &&
                        (event.getPropertyName().equals(VALUE_PROPERTY)) &&
                        event.getNewValue() != null &&
                        event.getNewValue() != JOptionPane.UNINITIALIZED_VALUE) {
                    dialog.setVisible(false);
                }
            }
        };

        WindowAdapter adapter = new WindowAdapter() {
            private boolean gotFocus = false;
            public void windowClosing(WindowEvent we) {
                setValue(null);
            }

            public void windowClosed(WindowEvent e) {
                removePropertyChangeListener(listener);
                dialog.getContentPane().removeAll();
            }

            public void windowGainedFocus(WindowEvent we) {
                // Once window gets focus, set initial focus
                if (!gotFocus) {
                    selectInitialValue();
                    gotFocus = true;
                }
            }
        };
        dialog.addWindowListener(adapter);
        dialog.addWindowFocusListener(adapter);
        dialog.addComponentListener(new ComponentAdapter() {
            public void componentShown(ComponentEvent ce) {
                // reset value to ensure closing works properly
                setValue(JOptionPane.UNINITIALIZED_VALUE);
            }
        });

        addPropertyChangeListener(listener);
    }


    /**
     * Brings up an internal confirmation dialog panel. The dialog
     * is a information-message dialog titled "Message".
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the object to display
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                                 Object message) {
        showInternalMessageDialog(parentComponent, message, UIManager.
                                 getString("OptionPane.messageDialogTitle",
                                 parentComponent), INFORMATION_MESSAGE);
    }

    /**
     * Brings up an internal dialog panel that displays a message
     * using a default icon determined by the <code>messageType
     * parameter.
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                                 Object message, String title,
                                                 int messageType) {
        showInternalMessageDialog(parentComponent, message, title, messageType,null);
    }

    /**
     * Brings up an internal dialog panel displaying a message,
     * specifying all parameters.
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the <code>Object to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param icon      an icon to display in the dialog that helps the user
     *                  identify the kind of message that is being displayed
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                         Object message,
                                         String title, int messageType,
                                         Icon icon){
        showInternalOptionDialog(parentComponent, message, title, DEFAULT_OPTION,
                                 messageType, icon, null, null);
    }

    /**
     * Brings up an internal dialog panel with the options <i>Yes, No
     * and <i>Cancel; with the title, Select an Option.
     *
     * @param parentComponent determines the <code>Frame in
     *          which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the <code>Object to display
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                                Object message) {
        return showInternalConfirmDialog(parentComponent, message,
                                 UIManager.getString("OptionPane.titleText"),
                                 YES_NO_CANCEL_OPTION);
    }

    /**
     * Brings up a internal dialog panel where the number of choices
     * is determined by the <code>optionType parameter.
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the object to display in the dialog; a
     *          <code>Component object is rendered as a
     *          <code>Component; a String
     *          object is rendered as a string; other objects
     *          are converted to a <code>String using the
     *          <code>toString method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options
     *          available on the dialog: <code>YES_NO_OPTION,
     *          or <code>YES_NO_CANCEL_OPTION
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                                Object message, String title,
                                                int optionType) {
        return showInternalConfirmDialog(parentComponent, message, title, optionType,
                                         QUESTION_MESSAGE);
    }

    /**
     * Brings up an internal dialog panel where the number of choices
     * is determined by the <code>optionType parameter, where
     * the <code>messageType parameter determines the icon to display.
     * The <code>messageType parameter is primarily used to supply
     * a default icon from the Look and Feel.
     *
     * @param parentComponent determines the <code>Frame in
     *          which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the object to display in the dialog; a
     *          <code>Component object is rendered as a
     *          <code>Component; a String
     *          object is rendered as a string; other objects are
     *          converted to a <code>String using the
     *          <code>toString method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options
     *          available on the dialog:
     *          <code>YES_NO_OPTION, or YES_NO_CANCEL_OPTION
     * @param messageType an integer designating the kind of message this is,
     *          primarily used to determine the icon from the
     *          pluggable Look and Feel: <code>ERROR_MESSAGE,
     *          <code>INFORMATION_MESSAGE,
     *          <code>WARNING_MESSAGE, QUESTION_MESSAGE,
     *          or <code>PLAIN_MESSAGE
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                        Object message,
                                        String title, int optionType,
                                        int messageType) {
        return showInternalConfirmDialog(parentComponent, message, title, optionType,
                                         messageType, null);
    }

    /**
     * Brings up an internal dialog panel with a specified icon, where
     * the number of choices is determined by the <code>optionType
     * parameter.
     * The <code>messageType parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the parentComponent has no Frame, a
     *          default <code>Frame is used
     * @param message   the object to display in the dialog; a
     *          <code>Component object is rendered as a
     *          <code>Component; a String
     *          object is rendered as a string; other objects are
     *          converted to a <code>String using the
     *          <code>toString method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *          on the dialog:
     *          <code>YES_NO_OPTION, or
     *          <code>YES_NO_CANCEL_OPTION.
     * @param messageType an integer designating the kind of message this is,
     *          primarily used to determine the icon from the pluggable
     *          Look and Feel: <code>ERROR_MESSAGE,
     *          <code>INFORMATION_MESSAGE,
     *          <code>WARNING_MESSAGE, QUESTION_MESSAGE,
     *          or <code>PLAIN_MESSAGE
     * @param icon      the icon to display in the dialog
     * @return an integer indicating the option selected by the user
     */
    public static int showInternalConfirmDialog(Component parentComponent,
                                        Object message,
                                        String title, int optionType,
                                        int messageType, Icon icon) {
        return showInternalOptionDialog(parentComponent, message, title, optionType,
                                        messageType, icon, null, null);
    }

    /**
     * Brings up an internal dialog panel with a specified icon, where
     * the initial choice is determined by the <code>initialValue
     * parameter and the number of choices is determined by the
     * <code>optionType parameter.
     * <p>
     * If <code>optionType is YES_NO_OPTION, or
     * <code>YES_NO_CANCEL_OPTION
     * and the <code>options parameter is null,
     * then the options are supplied by the Look and Feel.
     * <p>
     * The <code>messageType parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame
     *          in which the dialog is displayed; if <code>null,
     *          or if the <code>parentComponent has no
     *          <code>Frame, a default Frame is used
     * @param message   the object to display in the dialog; a
     *          <code>Component object is rendered as a
     *          <code>Component; a String
     *          object is rendered as a string. Other objects are
     *          converted to a <code>String using the
     *          <code>toString method
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *          on the dialog: <code>YES_NO_OPTION,
     *          or <code>YES_NO_CANCEL_OPTION
     * @param messageType an integer designating the kind of message this is;
     *          primarily used to determine the icon from the
     *          pluggable Look and Feel: <code>ERROR_MESSAGE,
     *          <code>INFORMATION_MESSAGE,
     *          <code>WARNING_MESSAGE, QUESTION_MESSAGE,
     *          or <code>PLAIN_MESSAGE
     * @param icon      the icon to display in the dialog
     * @param options   an array of objects indicating the possible choices
     *          the user can make; if the objects are components, they
     *          are rendered properly; non-<code>String
     *          objects are rendered using their <code>toString
     *          methods; if this parameter is <code>null,
     *          the options are determined by the Look and Feel
     * @param initialValue the object that represents the default selection
     *          for the dialog; only meaningful if <code>options
     *          is used; can be <code>null
     * @return an integer indicating the option chosen by the user,
     *          or <code>CLOSED_OPTION if the user closed the Dialog
     */
    public static int showInternalOptionDialog(Component parentComponent,
                                       Object message,
                                       String title, int optionType,
                                       int messageType, Icon icon,
                                       Object[] options, Object initialValue) {
        JOptionPane pane = new JOptionPane(message, messageType,
                optionType, icon, options, initialValue);
        pane.putClientProperty(PopupFactory_FORCE_HEAVYWEIGHT_POPUP,
                Boolean.TRUE);
        Component fo = KeyboardFocusManager.getCurrentKeyboardFocusManager().
                getFocusOwner();

        pane.setInitialValue(initialValue);

        JInternalFrame dialog =
            pane.createInternalFrame(parentComponent, title);
        pane.selectInitialValue();
        dialog.setVisible(true);

        /* Since all input will be blocked until this dialog is dismissed,
         * make sure its parent containers are visible first (this component
         * is tested below).  This is necessary for JApplets, because
         * because an applet normally isn't made visible until after its
         * start() method returns -- if this method is called from start(),
         * the applet will appear to hang while an invisible modal frame
         * waits for input.
         */
        if (dialog.isVisible() && !dialog.isShowing()) {
            Container parent = dialog.getParent();
            while (parent != null) {
                if (parent.isVisible() == false) {
                    parent.setVisible(true);
                }
                parent = parent.getParent();
            }
        }

        // Use reflection to get Container.startLWModal.
        try {
            Method method = AccessController.doPrivileged(new ModalPrivilegedAction(
                    Container.class, "startLWModal"));
            if (method != null) {
                method.invoke(dialog, (Object[])null);
            }
        } catch (IllegalAccessException ex) {
        } catch (IllegalArgumentException ex) {
        } catch (InvocationTargetException ex) {
        }

        if (parentComponent instanceof JInternalFrame) {
            try {
                ((JInternalFrame)parentComponent).setSelected(true);
            } catch (java.beans.PropertyVetoException e) {
            }
        }

        Object selectedValue = pane.getValue();

        if (fo != null && fo.isShowing()) {
            fo.requestFocus();
        }
        if (selectedValue == null) {
            return CLOSED_OPTION;
        }
        if (options == null) {
            if (selectedValue instanceof Integer) {
                return ((Integer)selectedValue).intValue();
            }
            return CLOSED_OPTION;
        }
        for(int counter = 0, maxCounter = options.length;
            counter < maxCounter; counter++) {
            if (options[counter].equals(selectedValue)) {
                return counter;
            }
        }
        return CLOSED_OPTION;
    }

    /**
     * Shows an internal question-message dialog requesting input from
     * the user parented to <code>parentComponent. The dialog
     * is displayed in the <code>Component's frame,
     * and is usually positioned below the <code>Component.
     *
     * @param parentComponent  the parent <code>Component
     *          for the dialog
     * @param message  the <code>Object to display
     */
    public static String showInternalInputDialog(Component parentComponent,
                                                 Object message) {
        return showInternalInputDialog(parentComponent, message, UIManager.
               getString("OptionPane.inputDialogTitle", parentComponent),
               QUESTION_MESSAGE);
    }

    /**
     * Shows an internal dialog requesting input from the user parented
     * to <code>parentComponent with the dialog having the title
     * <code>title and message type messageType.
     *
     * @param parentComponent the parent <code>Component for the dialog
     * @param message  the <code>Object to display
     * @param title    the <code>String to display in the
     *          dialog title bar
     * @param messageType the type of message that is to be displayed:
     *                    ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE,
     *                    QUESTION_MESSAGE, or PLAIN_MESSAGE
     */
    public static String showInternalInputDialog(Component parentComponent,
                             Object message, String title, int messageType) {
        return (String)showInternalInputDialog(parentComponent, message, title,
                                       messageType, null, null, null);
    }

    /**
     * Prompts the user for input in a blocking internal dialog where
     * the initial selection, possible selections, and all other
     * options can be specified. The user will able to choose from
     * <code>selectionValues, where null
     * implies the user can input
     * whatever they wish, usually by means of a <code>JTextField.
     * <code>initialSelectionValue is the initial value to prompt
     * the user with. It is up to the UI to decide how best to represent
     * the <code>selectionValues, but usually a
     * <code>JComboBox, JList, or
     * <code>JTextField will be used.
     *
     * @param parentComponent the parent <code>Component for the dialog
     * @param message  the <code>Object to display
     * @param title    the <code>String to display in the dialog
     *          title bar
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE, INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE, or PLAIN_MESSAGE
     * @param icon     the <code>Icon image to display
     * @param selectionValues an array of <code>Objects that
     *                  gives the possible selections
     * @param initialSelectionValue the value used to initialize the input
     *                  field
     * @return user's input, or <code>null meaning the user
     *          canceled the input
     */
    public static Object showInternalInputDialog(Component parentComponent,
            Object message, String title, int messageType, Icon icon,
            Object[] selectionValues, Object initialSelectionValue) {
        JOptionPane pane = new JOptionPane(message, messageType,
                OK_CANCEL_OPTION, icon, null, null);
        pane.putClientProperty(PopupFactory_FORCE_HEAVYWEIGHT_POPUP,
                Boolean.TRUE);
        Component fo = KeyboardFocusManager.getCurrentKeyboardFocusManager().
                getFocusOwner();

        pane.setWantsInput(true);
        pane.setSelectionValues(selectionValues);
        pane.setInitialSelectionValue(initialSelectionValue);

        JInternalFrame dialog =
            pane.createInternalFrame(parentComponent, title);

        pane.selectInitialValue();
        dialog.setVisible(true);

        /* Since all input will be blocked until this dialog is dismissed,
         * make sure its parent containers are visible first (this component
         * is tested below).  This is necessary for JApplets, because
         * because an applet normally isn't made visible until after its
         * start() method returns -- if this method is called from start(),
         * the applet will appear to hang while an invisible modal frame
         * waits for input.
         */
        if (dialog.isVisible() && !dialog.isShowing()) {
            Container parent = dialog.getParent();
            while (parent != null) {
                if (parent.isVisible() == false) {
                    parent.setVisible(true);
                }
                parent = parent.getParent();
            }
        }

        // Use reflection to get Container.startLWModal.
        try {
            Method method = AccessController.doPrivileged(new ModalPrivilegedAction(
                    Container.class, "startLWModal"));
            if (method != null) {
                method.invoke(dialog, (Object[])null);
            }
        } catch (IllegalAccessException ex) {
        } catch (IllegalArgumentException ex) {
        } catch (InvocationTargetException ex) {
        }

        if (parentComponent instanceof JInternalFrame) {
            try {
                ((JInternalFrame)parentComponent).setSelected(true);
            } catch (java.beans.PropertyVetoException e) {
            }
        }

        if (fo != null && fo.isShowing()) {
            fo.requestFocus();
        }
        Object value = pane.getInputValue();

        if (value == UNINITIALIZED_VALUE) {
            return null;
        }
        return value;
    }

    /**
     * Creates and returns an instance of <code>JInternalFrame.
     * The internal frame is created with the specified title,
     * and wrapping the <code>JOptionPane.
     * The returned <code>JInternalFrame is
     * added to the <code>JDesktopPane ancestor of
     * <code>parentComponent, or components
     * parent if one its ancestors isn't a <code>JDesktopPane,
     * or if <code>parentComponent
     * doesn't have a parent then a <code>RuntimeException is thrown.
     *
     * @param parentComponent  the parent <code>Component for
     *          the internal frame
     * @param title    the <code>String to display in the
     *          frame's title bar
     * @return a <code>JInternalFrame containing a
     *          <code>JOptionPane
     * @exception RuntimeException if <code>parentComponent does
     *          not have a valid parent
     */
    public JInternalFrame createInternalFrame(Component parentComponent,
                                 String title) {
        Container parent =
                JOptionPane.getDesktopPaneForComponent(parentComponent);

        if (parent == null && (parentComponent == null ||
                (parent = parentComponent.getParent()) == null)) {
            throw new RuntimeException("JOptionPane: parentComponent does " +
                    "not have a valid parent");
        }

        // Option dialogs should be closable only
        final JInternalFrame  iFrame = new JInternalFrame(title, false, true,
                                                           false, false);

        iFrame.putClientProperty("JInternalFrame.frameType", "optionDialog");
        iFrame.putClientProperty("JInternalFrame.messageType",
                                 Integer.valueOf(getMessageType()));

        iFrame.addInternalFrameListener(new InternalFrameAdapter() {
            public void internalFrameClosing(InternalFrameEvent e) {
                if (getValue() == UNINITIALIZED_VALUE) {
                    setValue(null);
                }
            }
        });
        addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                // Let the defaultCloseOperation handle the closing
                // if the user closed the iframe without selecting a button
                // (newValue = null in that case).  Otherwise, close the dialog.
                if (iFrame.isVisible() &&
                        event.getSource() == JOptionPane.this &&
                        event.getPropertyName().equals(VALUE_PROPERTY)) {
                // Use reflection to get Container.stopLWModal().
                try {
                    Method method = AccessController.doPrivileged(
                        new ModalPrivilegedAction(
                            Container.class, "stopLWModal"));
                    if (method != null) {
                        method.invoke(iFrame, (Object[])null);
                    }
                } catch (IllegalAccessException ex) {
                } catch (IllegalArgumentException ex) {
                } catch (InvocationTargetException ex) {
                }

                try {
                    iFrame.setClosed(true);
                }
                catch (java.beans.PropertyVetoException e) {
                }

                iFrame.setVisible(false);
                }
            }
        });
        iFrame.getContentPane().add(this, BorderLayout.CENTER);
        if (parent instanceof JDesktopPane) {
            parent.add(iFrame, JLayeredPane.MODAL_LAYER);
        } else {
            parent.add(iFrame, BorderLayout.CENTER);
        }
        Dimension iFrameSize = iFrame.getPreferredSize();
        Dimension rootSize = parent.getSize();
        Dimension parentSize = parentComponent.getSize();

        iFrame.setBounds((rootSize.width - iFrameSize.width) / 2,
                         (rootSize.height - iFrameSize.height) / 2,
                         iFrameSize.width, iFrameSize.height);
        // We want dialog centered relative to its parent component
        Point iFrameCoord =
          SwingUtilities.convertPoint(parentComponent, 0, 0, parent);
        int x = (parentSize.width - iFrameSize.width) / 2 + iFrameCoord.x;
        int y = (parentSize.height - iFrameSize.height) / 2 + iFrameCoord.y;

        // If possible, dialog should be fully visible
        int ovrx = x + iFrameSize.width - rootSize.width;
        int ovry = y + iFrameSize.height - rootSize.height;
        x = Math.max((ovrx > 0? x - ovrx: x), 0);
        y = Math.max((ovry > 0? y - ovry: y), 0);
        iFrame.setBounds(x, y, iFrameSize.width, iFrameSize.height);

        parent.validate();
        try {
            iFrame.setSelected(true);
        } catch (java.beans.PropertyVetoException e) {}

        return iFrame;
    }

    /**
     * Returns the specified component's <code>Frame.
     *
     * @param parentComponent the <code>Component to check for a
     *          <code>Frame
     * @return the <code>Frame that contains the component,
     *          or <code>getRootFrame
     *          if the component is <code>null,
     *          or does not have a valid <code>Frame parent
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see #getRootFrame
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Frame getFrameForComponent(Component parentComponent)
        throws HeadlessException {
        if (parentComponent == null)
            return getRootFrame();
        if (parentComponent instanceof Frame)
            return (Frame)parentComponent;
        return JOptionPane.getFrameForComponent(parentComponent.getParent());
    }

    /**
     * Returns the specified component's toplevel <code>Frame or
     * <code>Dialog.
     *
     * @param parentComponent the <code>Component to check for a
     *          <code>Frame or Dialog
     * @return the <code>Frame or Dialog that
     *          contains the component, or the default
     *          frame if the component is <code>null,
     *          or does not have a valid
     *          <code>Frame or Dialog parent
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    static Window getWindowForComponent(Component parentComponent)
        throws HeadlessException {
        if (parentComponent == null)
            return getRootFrame();
        if (parentComponent instanceof Frame || parentComponent instanceof Dialog)
            return (Window)parentComponent;
        return JOptionPane.getWindowForComponent(parentComponent.getParent());
    }


    /**
     * Returns the specified component's desktop pane.
     *
     * @param parentComponent the <code>Component to check for a
     *          desktop
     * @return the <code>JDesktopPane that contains the component,
     *          or <code>null if the component is null
     *          or does not have an ancestor that is a
     *          <code>JInternalFrame
     */
    public static JDesktopPane getDesktopPaneForComponent(Component parentComponent) {
        if(parentComponent == null)
            return null;
        if(parentComponent instanceof JDesktopPane)
            return (JDesktopPane)parentComponent;
        return getDesktopPaneForComponent(parentComponent.getParent());
    }

    private static final Object sharedFrameKey = JOptionPane.class;

    /**
     * Sets the frame to use for class methods in which a frame is
     * not provided.
     * <p>
     * <strong>Note:
     * It is recommended that rather than using this method you supply a valid parent.
     *
     * @param newRootFrame the default <code>Frame to use
     */
    public static void setRootFrame(Frame newRootFrame) {
        if (newRootFrame != null) {
            SwingUtilities.appContextPut(sharedFrameKey, newRootFrame);
        } else {
            SwingUtilities.appContextRemove(sharedFrameKey);
        }
    }

    /**
     * Returns the <code>Frame to use for the class methods in
     * which a frame is not provided.
     *
     * @return the default <code>Frame to use
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless returns
     *   <code>true
     * @see #setRootFrame
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Frame getRootFrame() throws HeadlessException {
        Frame sharedFrame =
            (Frame)SwingUtilities.appContextGet(sharedFrameKey);
        if (sharedFrame == null) {
            sharedFrame = SwingUtilities.getSharedOwnerFrame();
            SwingUtilities.appContextPut(sharedFrameKey, sharedFrame);
        }
        return sharedFrame;
    }

    /**
     * Creates a <code>JOptionPane with a test message.
     */
    public JOptionPane() {
        this("JOptionPane message");
    }

    /**
     * Creates a instance of <code>JOptionPane to display a
     * message using the
     * plain-message message type and the default options delivered by
     * the UI.
     *
     * @param message the <code>Object to display
     */
    public JOptionPane(Object message) {
        this(message, PLAIN_MESSAGE);
    }

    /**
     * Creates an instance of <code>JOptionPane to display a message
     * with the specified message type and the default options,
     *
     * @param message the <code>Object to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     */
    public JOptionPane(Object message, int messageType) {
        this(message, messageType, DEFAULT_OPTION);
    }

    /**
     * Creates an instance of <code>JOptionPane to display a message
     * with the specified message type and options.
     *
     * @param message the <code>Object to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION, YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  <code>OK_CANCEL_OPTION
     */
    public JOptionPane(Object message, int messageType, int optionType) {
        this(message, messageType, optionType, null);
    }

    /**
     * Creates an instance of <code>JOptionPane to display a message
     * with the specified message type, options, and icon.
     *
     * @param message the <code>Object to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION, YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  <code>OK_CANCEL_OPTION
     * @param icon the <code>Icon image to display
     */
    public JOptionPane(Object message, int messageType, int optionType,
                       Icon icon) {
        this(message, messageType, optionType, icon, null);
    }

    /**
     * Creates an instance of <code>JOptionPane to display a message
     * with the specified message type, icon, and options.
     * None of the options is initially selected.
     * <p>
     * The options objects should contain either instances of
     * <code>Components, (which are added directly) or
     * <code>Strings (which are wrapped in a JButton).
     * If you provide <code>Components, you must ensure that when the
     * <code>Component is clicked it messages setValue
     * in the created <code>JOptionPane.
     *
     * @param message the <code>Object to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION,
     *                  <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  <code>OK_CANCEL_OPTION
     * @param icon the <code>Icon image to display
     * @param options  the choices the user can select
     */
    public JOptionPane(Object message, int messageType, int optionType,
                       Icon icon, Object[] options) {
        this(message, messageType, optionType, icon, options, null);
    }

    /**
     * Creates an instance of <code>JOptionPane to display a message
     * with the specified message type, icon, and options, with the
     * initially-selected option specified.
     *
     * @param message the <code>Object to display
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE,
     *                  <code>INFORMATION_MESSAGE,
     *                  <code>WARNING_MESSAGE,
     *                  <code>QUESTION_MESSAGE,
     *                  or <code>PLAIN_MESSAGE
     * @param optionType the options to display in the pane:
     *                  <code>DEFAULT_OPTION,
     *                  <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  <code>OK_CANCEL_OPTION
     * @param icon the Icon image to display
     * @param options  the choices the user can select
     * @param initialValue the choice that is initially selected; if
     *                  <code>null, then nothing will be initially selected;
     *                  only meaningful if <code>options is used
     */
    public JOptionPane(Object message, int messageType, int optionType,
                       Icon icon, Object[] options, Object initialValue) {

        this.message = message;
        this.options = options;
        this.initialValue = initialValue;
        this.icon = icon;
        setMessageType(messageType);
        setOptionType(optionType);
        value = UNINITIALIZED_VALUE;
        inputValue = UNINITIALIZED_VALUE;
        updateUI();
    }

    /**
     * Sets the UI object which implements the {@literal L&F} for this component.
     *
     * @param ui  the <code>OptionPaneUI {@literal L&F} object
     * @see UIDefaults#getUI
     * @beaninfo
     *       bound: true
     *      hidden: true
     * description: The UI object that implements the optionpane's LookAndFeel
     */
    public void setUI(OptionPaneUI ui) {
        if (this.ui != ui) {
            super.setUI(ui);
            invalidate();
        }
    }

    /**
     * Returns the UI object which implements the {@literal L&F} for this component.
     *
     * @return the <code>OptionPaneUI object
     */
    public OptionPaneUI getUI() {
        return (OptionPaneUI)ui;
    }

    /**
     * Notification from the <code>UIManager that the {@literal L&F} has changed.
     * Replaces the current UI object with the latest version from the
     * <code>UIManager.
     *
     * @see JComponent#updateUI
     */
    public void updateUI() {
        setUI((OptionPaneUI)UIManager.getUI(this));
    }


    /**
     * Returns the name of the UI class that implements the
     * {@literal L&F} for this component.
     *
     * @return the string "OptionPaneUI"
     * @see JComponent#getUIClassID
     * @see UIDefaults#getUI
     */
    public String getUIClassID() {
        return uiClassID;
    }


    /**
     * Sets the option pane's message-object.
     * @param newMessage the <code>Object to display
     * @see #getMessage
     *
     * @beaninfo
     *   preferred: true
     *   bound: true
     * description: The optionpane's message object.
     */
    public void setMessage(Object newMessage) {
        Object           oldMessage = message;

        message = newMessage;
        firePropertyChange(MESSAGE_PROPERTY, oldMessage, message);
    }

    /**
     * Returns the message-object this pane displays.
     * @see #setMessage
     *
     * @return the <code>Object that is displayed
     */
    public Object getMessage() {
        return message;
    }

    /**
     * Sets the icon to display. If non-<code>null, the look and feel
     * does not provide an icon.
     * @param newIcon the <code>Icon to display
     *
     * @see #getIcon
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's type icon.
     */
    public void setIcon(Icon newIcon) {
        Object              oldIcon = icon;

        icon = newIcon;
        firePropertyChange(ICON_PROPERTY, oldIcon, icon);
    }

    /**
     * Returns the icon this pane displays.
     * @return the <code>Icon that is displayed
     *
     * @see #setIcon
     */
    public Icon getIcon() {
        return icon;
    }

    /**
     * Sets the value the user has chosen.
     * @param newValue  the chosen value
     *
     * @see #getValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's value object.
     */
    public void setValue(Object newValue) {
        Object               oldValue = value;

        value = newValue;
        firePropertyChange(VALUE_PROPERTY, oldValue, value);
    }

    /**
     * Returns the value the user has selected. <code>UNINITIALIZED_VALUE
     * implies the user has not yet made a choice, <code>null means the
     * user closed the window with out choosing anything. Otherwise
     * the returned value will be one of the options defined in this
     * object.
     *
     * @return the <code>Object chosen by the user,
     *         <code>UNINITIALIZED_VALUE
     *         if the user has not yet made a choice, or <code>null if
     *         the user closed the window without making a choice
     *
     * @see #setValue
     */
    public Object getValue() {
        return value;
    }

    /**
     * Sets the options this pane displays. If an element in
     * <code>newOptions is a Component
     * it is added directly to the pane,
     * otherwise a button is created for the element.
     *
     * @param newOptions an array of <code>Objects that create the
     *          buttons the user can click on, or arbitrary
     *          <code>Components to add to the pane
     *
     * @see #getOptions
     * @beaninfo
     *       bound: true
     * description: The option pane's options objects.
     */
    public void setOptions(Object[] newOptions) {
        Object[]           oldOptions = options;

        options = newOptions;
        firePropertyChange(OPTIONS_PROPERTY, oldOptions, options);
    }

    /**
     * Returns the choices the user can make.
     * @return the array of <code>Objects that give the user's choices
     *
     * @see #setOptions
     */
    public Object[] getOptions() {
        if(options != null) {
            int             optionCount = options.length;
            Object[]        retOptions = new Object[optionCount];

            System.arraycopy(options, 0, retOptions, 0, optionCount);
            return retOptions;
        }
        return options;
    }

    /**
     * Sets the initial value that is to be enabled -- the
     * <code>Component
     * that has the focus when the pane is initially displayed.
     *
     * @param newInitialValue the <code>Object that gets the initial
     *                         keyboard focus
     *
     * @see #getInitialValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's initial value object.
     */
    public void setInitialValue(Object newInitialValue) {
        Object            oldIV = initialValue;

        initialValue = newInitialValue;
        firePropertyChange(INITIAL_VALUE_PROPERTY, oldIV, initialValue);
    }

    /**
     * Returns the initial value.
     *
     * @return the <code>Object that gets the initial keyboard focus
     *
     * @see #setInitialValue
     */
    public Object getInitialValue() {
        return initialValue;
    }

    /**
     * Sets the option pane's message type.
     * The message type is used by the Look and Feel to determine the
     * icon to display (if not supplied) as well as potentially how to
     * lay out the <code>parentComponent.
     * @param newType an integer specifying the kind of message to display:
     *                <code>ERROR_MESSAGE, INFORMATION_MESSAGE,
     *                <code>WARNING_MESSAGE,
     *                <code>QUESTION_MESSAGE, or PLAIN_MESSAGE
     * @exception RuntimeException if <code>newType is not one of the
     *          legal values listed above

     * @see #getMessageType
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's message type.
     */
    public void setMessageType(int newType) {
        if(newType != ERROR_MESSAGE && newType != INFORMATION_MESSAGE &&
           newType != WARNING_MESSAGE && newType != QUESTION_MESSAGE &&
           newType != PLAIN_MESSAGE)
            throw new RuntimeException("JOptionPane: type must be one of JOptionPane.ERROR_MESSAGE, JOptionPane.INFORMATION_MESSAGE, JOptionPane.WARNING_MESSAGE, JOptionPane.QUESTION_MESSAGE or JOptionPane.PLAIN_MESSAGE");

        int           oldType = messageType;

        messageType = newType;
        firePropertyChange(MESSAGE_TYPE_PROPERTY, oldType, messageType);
    }

    /**
     * Returns the message type.
     *
     * @return an integer specifying the message type
     *
     * @see #setMessageType
     */
    public int getMessageType() {
        return messageType;
    }

    /**
     * Sets the options to display.
     * The option type is used by the Look and Feel to
     * determine what buttons to show (unless options are supplied).
     * @param newType an integer specifying the options the {@literal L&F} is to display:
     *                  <code>DEFAULT_OPTION,
     *                  <code>YES_NO_OPTION,
     *                  <code>YES_NO_CANCEL_OPTION,
     *                  or <code>OK_CANCEL_OPTION
     * @exception RuntimeException if <code>newType is not one of
     *          the legal values listed above
     *
     * @see #getOptionType
     * @see #setOptions
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's option type.
      */
    public void setOptionType(int newType) {
        if(newType != DEFAULT_OPTION && newType != YES_NO_OPTION &&
           newType != YES_NO_CANCEL_OPTION && newType != OK_CANCEL_OPTION)
            throw new RuntimeException("JOptionPane: option type must be one of JOptionPane.DEFAULT_OPTION, JOptionPane.YES_NO_OPTION, JOptionPane.YES_NO_CANCEL_OPTION or JOptionPane.OK_CANCEL_OPTION");

        int            oldType = optionType;

        optionType = newType;
        firePropertyChange(OPTION_TYPE_PROPERTY, oldType, optionType);
    }

    /**
     * Returns the type of options that are displayed.
     *
     * @return an integer specifying the user-selectable options
     *
     * @see #setOptionType
     */
    public int getOptionType() {
        return optionType;
    }

    /**
     * Sets the input selection values for a pane that provides the user
     * with a list of items to choose from. (The UI provides a widget
     * for choosing one of the values.)  A <code>null value
     * implies the user can input whatever they wish, usually by means
     * of a <code>JTextField.
     * <p>
     * Sets <code>wantsInput to true. Use
     * <code>setInitialSelectionValue to specify the initially-chosen
     * value. After the pane as been enabled, <code>inputValue is
     * set to the value the user has selected.
     * @param newValues an array of <code>Objects the user to be
     *                  displayed
     *                  (usually in a list or combo-box) from which
     *                  the user can make a selection
     * @see #setWantsInput
     * @see #setInitialSelectionValue
     * @see #getSelectionValues
     * @beaninfo
     *       bound: true
     * description: The option pane's selection values.
     */
    public void setSelectionValues(Object[] newValues) {
        Object[]           oldValues = selectionValues;

        selectionValues = newValues;
        firePropertyChange(SELECTION_VALUES_PROPERTY, oldValues, newValues);
        if(selectionValues != null)
            setWantsInput(true);
    }

    /**
     * Returns the input selection values.
     *
     * @return the array of <code>Objects the user can select
     * @see #setSelectionValues
     */
    public Object[] getSelectionValues() {
        return selectionValues;
    }

    /**
     * Sets the input value that is initially displayed as selected to the user.
     * Only used if <code>wantsInput is true.
     * @param newValue the initially selected value
     * @see #setSelectionValues
     * @see #getInitialSelectionValue
     * @beaninfo
     *       bound: true
     * description: The option pane's initial selection value object.
     */
    public void setInitialSelectionValue(Object newValue) {
        Object          oldValue = initialSelectionValue;

        initialSelectionValue = newValue;
        firePropertyChange(INITIAL_SELECTION_VALUE_PROPERTY, oldValue,
                           newValue);
    }

    /**
     * Returns the input value that is displayed as initially selected to the user.
     *
     * @return the initially selected value
     * @see #setInitialSelectionValue
     * @see #setSelectionValues
     */
    public Object getInitialSelectionValue() {
        return initialSelectionValue;
    }

    /**
     * Sets the input value that was selected or input by the user.
     * Only used if <code>wantsInput is true.  Note that this method
     * is invoked internally by the option pane (in response to user action)
     * and should generally not be called by client programs.  To set the
     * input value initially displayed as selected to the user, use
     * <code>setInitialSelectionValue.
     *
     * @param newValue the <code>Object used to set the
     *          value that the user specified (usually in a text field)
     * @see #setSelectionValues
     * @see #setInitialSelectionValue
     * @see #setWantsInput
     * @see #getInputValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: The option pane's input value object.
     */
    public void setInputValue(Object newValue) {
        Object              oldValue = inputValue;

        inputValue = newValue;
        firePropertyChange(INPUT_VALUE_PROPERTY, oldValue, newValue);
    }

    /**
     * Returns the value the user has input, if <code>wantsInput
     * is true.
     *
     * @return the <code>Object the user specified,
     *          if it was one of the objects, or a
     *          <code>String if it was a value typed into a
     *          field
     * @see #setSelectionValues
     * @see #setWantsInput
     * @see #setInputValue
     */
    public Object getInputValue() {
        return inputValue;
    }

    /**
     * Returns the maximum number of characters to place on a line in a
     * message. Default is to return <code>Integer.MAX_VALUE.
     * The value can be
     * changed by overriding this method in a subclass.
     *
     * @return an integer giving the maximum number of characters on a line
     */
    public int getMaxCharactersPerLineCount() {
        return Integer.MAX_VALUE;
    }

    /**
     * Sets the <code>wantsInput property.
     * If <code>newValue is true, an input component
     * (such as a text field or combo box) whose parent is
     * <code>parentComponent is provided to
     * allow the user to input a value. If <code>getSelectionValues
     * returns a non-<code>null array, the input value is one of the
     * objects in that array. Otherwise the input value is whatever
     * the user inputs.
     * <p>
     * This is a bound property.
     *
     * @see #setSelectionValues
     * @see #setInputValue
     * @beaninfo
     *   preferred: true
     *       bound: true
     * description: Flag which allows the user to input a value.
     */
    public void setWantsInput(boolean newValue) {
        boolean            oldValue = wantsInput;

        wantsInput = newValue;
        firePropertyChange(WANTS_INPUT_PROPERTY, oldValue, newValue);
    }

    /**
     * Returns the value of the <code>wantsInput property.
     *
     * @return true if an input component will be provided
     * @see #setWantsInput
     */
    public boolean getWantsInput() {
        return wantsInput;
    }

    /**
     * Requests that the initial value be selected, which will set
     * focus to the initial value. This method
     * should be invoked after the window containing the option pane
     * is made visible.
     */
    public void selectInitialValue() {
        OptionPaneUI         ui = getUI();
        if (ui != null) {
            ui.selectInitialValue(this);
        }
    }


    private static int styleFromMessageType(int messageType) {
        switch (messageType) {
        case ERROR_MESSAGE:
            return JRootPane.ERROR_DIALOG;
        case QUESTION_MESSAGE:
            return JRootPane.QUESTION_DIALOG;
        case WARNING_MESSAGE:
            return JRootPane.WARNING_DIALOG;
        case INFORMATION_MESSAGE:
            return JRootPane.INFORMATION_DIALOG;
        case PLAIN_MESSAGE:
        default:
            return JRootPane.PLAIN_DIALOG;
        }
    }

    // Serialization support.
    private void writeObject(ObjectOutputStream s) throws IOException {
        Vector<Object> values = new Vector

Java example source code file (JOptionPane.java)

This example Java source code file (JOptionPane.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, closed_option, default_option, error_message, event, headlessexception, icon, information_message, javabean, jdialog, jinternalframe, joptionpane, object, question_message, reflection, security, serializable, string, swing, yes_no_cancel_option

The JOptionPane.java Java example source code

/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.KeyboardFocusManager;
import java.awt.Frame;
import java.awt.Point;
import java.awt.HeadlessException;
import java.awt.Window;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Vector;
import javax.swing.plaf.OptionPaneUI;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameAdapter;
import javax.accessibility.*;
import static javax.swing.ClientPropertyKey.PopupFactory_FORCE_HEAVYWEIGHT_POPUP;

/**
 * <code>JOptionPane makes it easy to pop up a standard dialog box that
 * prompts users for a value or informs them of something.
 * For information about using <code>JOptionPane, see
 * <a
 href="http://docs.oracle.com/javase/tutorial/uiswing/components/dialog.html">How to Make Dialogs</a>,
 * a section in <em>The Java Tutorial.
 *
 * <p>
 *
 * While the <code>JOptionPane
 * class may appear complex because of the large number of methods, almost
 * all uses of this class are one-line calls to one of the static
 * <code>showXxxDialog methods shown below:
 * <blockquote>
 *
 *
 * <table border=1 summary="Common JOptionPane method names and their descriptions">
 * <tr>
 *    <th>Method Name
 *    <th>Description
 * </tr>
 * <tr>
 *    <td>showConfirmDialog

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Java example source code file (JOptionPane.java)

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The JOptionPane.java Java example source code

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