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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

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 * version 2 for more details (a copy is included in the LICENSE file that

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/* @test

   @bug 6921687

   @summary Mnemonic disappears after repeated attempts to open menu items using

   mnemonics

   @author Semyon Sadetsky

   @library /lib/testlibrary

   @build jdk.testlibrary.OSInfo

  */

import jdk.testlibrary.OSInfo;

import javax.swing.*;

import java.awt.*;

import java.awt.event.KeyEvent;

public class bug6921687 {

    private static Class lafClass;

    private static JFrame frame;

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

        if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) {

            System.out.println("Only Windows platform test. Test is skipped.");

            System.out.println("ok");

            return;

        }

        lafClass = Class.forName(UIManager.getSystemLookAndFeelClassName());

        UIManager.setLookAndFeel((LookAndFeel) lafClass.newInstance());

        try {

            SwingUtilities.invokeAndWait(new Runnable() {

                public void run() {

                    frame = new JFrame();

                    frame.setUndecorated(true);

                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                    setup(frame);

                }

            });

            final Robot robot = new Robot();

            robot.setAutoDelay(20);

            robot.keyPress(KeyEvent.VK_ALT);

            robot.keyPress(KeyEvent.VK_F);

            robot.keyRelease(KeyEvent.VK_F);

            robot.keyRelease(KeyEvent.VK_ALT);

            robot.waitForIdle();

            checkMnemonics();

            robot.keyPress(KeyEvent.VK_ALT);

            robot.keyPress(KeyEvent.VK_S);

            robot.keyRelease(KeyEvent.VK_S);

            robot.keyRelease(KeyEvent.VK_ALT);

            robot.waitForIdle();

            checkMnemonics();

            System.out.println("ok");

        } finally {

            frame.dispose();

        }

    }

    private static void checkMnemonics() throws Exception {

        if ((Boolean) lafClass.getMethod("isMnemonicHidden").invoke(lafClass)) {

            throw new RuntimeException("Mnemonics are hidden");

        }

    }

    private static void setup(JFrame frame) {

        JMenuBar menuBar = new JMenuBar();

        frame.setJMenuBar(menuBar);

        // First Menu, F - Mnemonic

        JMenu firstMenu = new JMenu("First Menu");

        firstMenu.setMnemonic(KeyEvent.VK_F);

        firstMenu.add(new JMenuItem("One", KeyEvent.VK_O));

        firstMenu.add(new JMenuItem("Two", KeyEvent.VK_T));

        menuBar.add(firstMenu);

        // Second Menu, S - Mnemonic

        JMenu secondMenu = new JMenu("Second Menu");

        secondMenu.setMnemonic(KeyEvent.VK_S);

        secondMenu.add(new JMenuItem("A Menu Item", KeyEvent.VK_A));

        menuBar.add(secondMenu);

        frame.setSize(350, 250);

        frame.setVisible(true);

    }

}