Java example source code file (EmptyListEventTest.java)

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Java - Java tags/keywords

actionlistener, awt, awteventlistener, borderlayout, event, gui, itemlistener, jframe, jpanel, mylistener, override, point, robot, runnable, runtimeexception, suntoolkit, swing, test

The EmptyListEventTest.java Java example source code

/*
 * Copyright (c) 2008, 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.
 */

/*
 * @test
 * @bug 6366126
 * @summary List throws ArrayIndexOutOfBoundsException when pressing ENTER after removing all the items, Win32
 * @author Dmitry Cherepanov area=awt.list
 * @run main EmptyListEventTest
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import sun.awt.SunToolkit;

public class EmptyListEventTest {

    private static List list;

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

        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        Robot robot = new Robot();
        robot.setAutoDelay(50);

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override
            public void run() {
                createAndShowGUI();
            }
        });

        toolkit.realSync();

        // press mouse -> ItemEvent
        Point point = getClickPoint();
        robot.mouseMove(point.x, point.y);
        robot.mousePress(InputEvent.BUTTON1_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_MASK);

        toolkit.realSync();

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override
            public void run() {
                list.requestFocusInWindow();
            }
        });

        toolkit.realSync();

        if (KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner() != list) {
            throw new RuntimeException("Test failed - list isn't focus owner.");
        }

        // press key ENTER -> ActionEvent
        robot.keyPress(KeyEvent.VK_ENTER);
        robot.keyRelease(KeyEvent.VK_ENTER);
        toolkit.realSync();

        // press key SPACE -> ItemEvent
        robot.keyPress(KeyEvent.VK_SPACE);
        robot.keyRelease(KeyEvent.VK_SPACE);
        toolkit.realSync();

        // mouse double click -> ActionEvent
        robot.setAutoDelay(10);
        robot.mousePress(InputEvent.BUTTON1_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_MASK);
        robot.mousePress(InputEvent.BUTTON1_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_MASK);
        toolkit.realSync();
    }

    private static Point getClickPoint() throws Exception {
        final Point[] result = new Point[1];

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override
            public void run() {
                Point point = list.getLocationOnScreen();
                point.translate(list.getWidth() / 2, list.getHeight() / 2);
                result[0] = point;

            }
        });

        return result[0];


    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame();
        frame.setSize(200, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel(new BorderLayout());

        frame.getToolkit().addAWTEventListener(new AWTEventListener() {

            public void eventDispatched(AWTEvent e) {
                System.out.println(e);
            }
        }, AWTEvent.FOCUS_EVENT_MASK | AWTEvent.WINDOW_FOCUS_EVENT_MASK);


        MyListener listener = new MyListener();

        list = new List(4, true);
        list.addActionListener(listener);
        list.addItemListener(listener);

        panel.add(list);

        frame.getContentPane().add(panel);
        frame.setVisible(true);

    }

    static class MyListener implements ActionListener, ItemListener {

        public void actionPerformed(ActionEvent ae) {
            System.err.println(ae);
            throw new RuntimeException("Test failed - list is empty so event is redundant");
        }

        public void itemStateChanged(ItemEvent ie) {
            System.err.println(ie);
            throw new RuntimeException("Test failed - list is empty so event is redundant");
        }
    }
}