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 }