1 /*

     2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

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

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 import java.awt.*;

    24 import javax.swing.*;

    25 import java.awt.event.*;

    26 import sun.awt.SunToolkit;

    27 

    28 /**

    29  * @test

    30  * @bug 7161568

    31  * @author Alexander Scherbatiy

    32  * @summary Tests that navigating tabs in the JTAbbedPane does not throw NPE

    33  * @run main bug7161568

    34  */

    35 public class bug7161568 {

    36 

    37     private static final int N = 50;

    38     private static JTabbedPane tabbedPane;

    39 

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

    41         UIManager.put("TabbedPane.selectionFollowsFocus", Boolean.FALSE);

    42 

    43         SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();

    44         Robot robot = new Robot();

    45         robot.setAutoDelay(50);

    46 

    47         SwingUtilities.invokeAndWait(new Runnable() {

    48 

    49             @Override

    50             public void run() {

    51                 createAndShowUI();

    52             }

    53         });

    54 

    55         toolkit.realSync();

    56 

    57         SwingUtilities.invokeAndWait(new Runnable() {

    58 

    59             @Override

    60             public void run() {

    61                 tabbedPane.requestFocus();

    62             }

    63         });

    64 

    65         toolkit.realSync();

    66 

    67         for (int i = 0; i < N; i++) {

    68             robot.keyPress(KeyEvent.VK_LEFT);

    69             robot.keyRelease(KeyEvent.VK_LEFT);

    70             toolkit.realSync();

    71         }

    72     }

    73 

    74     static void createAndShowUI() {

    75         JFrame frame = new JFrame("Test");

    76         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    77         frame.setSize(100, 100);

    78 

    79         tabbedPane = new JTabbedPane();

    80 

    81         for (int i = 0; i < N; i++) {

    82             tabbedPane.addTab("Tab: " + i, new JLabel("Test"));

    83         }

    84 

    85         tabbedPane.setSelectedIndex(0);

    86 

    87         frame.getContentPane().add(tabbedPane);

    88         frame.setVisible(true);

    89     }

    90 }