Java example source code file (bug7049024.java)

This example Java source code file (bug7049024.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, clipboard, datatransfer, defaultcaret, exception, flowlayout, gui, jbutton, jframe, jtextfield, override, runnable, runtimeexception, string, suntoolkit, swing, test, text

The bug7049024.java Java example source code

/*
 * Copyright (c) 2011, 2012, 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.
 *
 * 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.
 */

/*
 * Portions Copyright (c) 2011 IBM Corporation
 */

/* @test
 * @bug 7049024
 * @summary DnD fails with JTextArea and JTextField
 * @author Sean Chou
 */

import sun.awt.SunToolkit;

import javax.swing.*;
import javax.swing.text.DefaultCaret;
import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;

public class bug7049024 {
    public static Clipboard clipboard = null;

    public static JTextField textField = null;

    // This button is used to move focus away from textField.
    public static JButton button = null;

    public static JFrame frame = null;

    public static DefaultCaret caret = null;

    public static void main(String[] args) throws Exception {

        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                frame = new JFrame("Test");
                textField = new JTextField("test selection for textfield");
                button = new JButton("To compete the focus");

                frame.setLayout(new FlowLayout());
                frame.getContentPane().add(textField);
                frame.getContentPane().add(button);

                frame.pack();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
        toolkit.realSync();

        clipboard = textField.getToolkit().getSystemSelection();
        if (null == clipboard) {
            return;
        }

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                textField.requestFocusInWindow();
            }
        });
        toolkit.realSync();

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                caret = (DefaultCaret) textField.getCaret();
                caret.setDot(2);
                caret.moveDot(4);
            }
        });
        toolkit.realSync();

        String oldSelection = (String) clipboard.getData(DataFlavor.stringFlavor);
        System.out.println("oldSelection is " + oldSelection);

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                button.requestFocusInWindow();
            }
        });
        toolkit.realSync(); // So JTextField loses the focus.

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                caret.setDot(4);
                caret.moveDot(6);
            }
        });
        toolkit.realSync();

        String newSelection = (String) clipboard.getData(DataFlavor.stringFlavor);
        System.out.println("newSelection is " + newSelection);

        boolean passed = newSelection.equals(oldSelection);

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                frame.dispose();
            }
        });

        if (!passed) {
            throw new RuntimeException("The test for bug 7049024 failed");
        }
    }
}