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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 *
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 * 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).
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 */

/*
 * @test
 * @bug 4234034
 * @summary Tests NullPointerException when ToolTip invoked via keyboard
 * @key headful
 * @run main bug4234034
 */

import java.awt.Robot;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class bug4234034 {
    static JFrame frame;
    static JButton button;

    public static void main(String args[]) throws Exception {
        Robot robot = new Robot();
        robot.setAutoDelay(100);
        try {
            SwingUtilities.invokeAndWait(() -> {
                frame = new JFrame("bug4323121");
                button = new JButton("Press tab, then Ctrl+F1");
                button.setToolTipText("Tooltip for button");
                frame.getContentPane().add(button);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            });
            robot.waitForIdle();
            robot.delay(1000);
            robot.keyPress(KeyEvent.VK_TAB);
            robot.keyRelease(KeyEvent.VK_TAB);
            robot.keyPress(KeyEvent.VK_CONTROL);
            robot.keyPress(KeyEvent.VK_F1);
            robot.keyRelease(KeyEvent.VK_F1);
            robot.keyRelease(KeyEvent.VK_CONTROL);
        } finally {
            SwingUtilities.invokeAndWait(() -> {
                if (frame != null) {
                    frame.dispose();
                }
            });
        }
    }
}