1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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13  * accompanied this code).
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23 
24 /*
25  * @test
26  * @key headful
27  * @bug 8176490
28  * @summary Tests that there is no hang or deadlock when the visibility
29  *      of parent and child windows is changed.
30  * @library ../../regtesthelpers
31  * @build Util
32  * @run main/timeout=20 WindowDeadlockTest
33  */
34 
35 import java.awt.Dialog;
36 import java.awt.Frame;
37 import java.awt.Robot;
38 
39 import test.java.awt.regtesthelpers.Util;
40 
41 public class WindowDeadlockTest {
main(String[] args)42     public static void main(String[] args) throws Exception {
43         Robot robot = Util.createRobot();
44 
45         Frame main = new Frame("Main");
46         main.setBounds(0, 0, 200, 100);
47         main.setVisible(true);
48 
49         Dialog first = new Dialog(main, "First");
50         first.setBounds(250, 0, 200, 100);
51         first.setVisible(true);
52 
53         Dialog second = new Dialog(first, "Second");
54         second.setBounds(0, 150, 200, 100);
55         second.setVisible(true);
56 
57         Util.waitForIdle(robot);
58         robot.delay(2000);
59 
60         Dialog third = new Dialog(first, "Third", false);
61         third.setBounds(250, 150, 200, 100);
62         third.setVisible(true);
63         first.setVisible(false); // the hang takes place here
64 
65         Util.waitForIdle(robot);
66         robot.delay(2000);
67 
68         third.dispose();
69         second.dispose();
70         first.dispose();
71         main.dispose();
72     }
73 }
74