Java example source code file (bug4458079.java)

This example Java source code file (bug4458079.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

actionlistener, awt, event, gui, jbutton, jframe, jmenu, jmenubar, jmenuitem, popupmenulistener, robot, runnable, runtimeexception, string, suntoolkit, swing, test, util

The bug4458079.java Java example source code

/*
 * Copyright (c) 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.
 *
 * 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 4458079
   @library ../../regtesthelpers
   @build Util
   @summary Tests calling removeAll() from PopupMenuListener
   @author Peter Zhelezniakov
   @run main bug4458079
*/
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import sun.awt.SunToolkit;

public class bug4458079 extends JFrame implements PopupMenuListener {
    public JMenu menu;

    static volatile boolean itemASelected = false;
    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                new bug4458079().createAndShowGUI();
            }
        });
        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        toolkit.realSync();

        Robot robot = new Robot();
        robot.setAutoDelay(50);

        Util.hitMnemonics(robot, KeyEvent.VK_M);

        toolkit.realSync();
        Thread.sleep(1000);

        Util.hitKeys(robot, KeyEvent.VK_DOWN);
        Util.hitKeys(robot, KeyEvent.VK_ENTER);

        toolkit.realSync();
        Thread.sleep(1000);

        if (!itemASelected) {
            throw new RuntimeException("Test failed: arrow key traversal in JMenu broken!");
        }
    }
    public void createAndShowGUI() {
        JMenuBar bar = new JMenuBar();
        menu = new JMenu("Menu");
        menu.add(new JMenuItem("1"));
        menu.add(new JMenuItem("2"));
        menu.setMnemonic(KeyEvent.VK_M);
        menu.getPopupMenu().addPopupMenuListener(this);
        bar.add(menu);

        setJMenuBar(bar);
        getContentPane().add(new JButton(""));
        setSize(300, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    public void rebuildMenu() {
        menu.removeAll();
        final String itemCommand = "A";
        JMenuItem item = new JMenuItem(itemCommand);
        item.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JMenuItem item = ((JMenuItem)e.getSource());
                if (e.getActionCommand() == itemCommand) {
                    itemASelected = true;
                }
            }
        });
        menu.add(item);
        menu.add(new JMenuItem("B"));
    }

    public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
        rebuildMenu();
    }

    public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {}
    public void popupMenuCanceled(PopupMenuEvent e) {}
}