1 /*
   2  * Copyright (c) 2016, 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 
  24 /* @test
  25  * @bug 6567433
  26  *
  27  * @summary  JComboBox.updateUI() invokes updateUI() on its cellrenderer via
  28  * SwingUtilities.updateComponentTreeUI().
  29  * If the cellrenderer is a parent of this JComboBox the method recurses
  30  * endless.
  31  * This test tests that the fix is effective in avoiding recursion.
  32  *
  33  * @run main/othervm UpdateUIRecursionTest
  34  */
  35 
  36 import java.awt.BorderLayout;
  37 import java.awt.Component;
  38 import javax.swing.DefaultListCellRenderer;
  39 import javax.swing.JComboBox;
  40 import javax.swing.JFrame;
  41 import javax.swing.JList;
  42 import javax.swing.JScrollPane;
  43 import javax.swing.ListCellRenderer;
  44 import javax.swing.SwingUtilities;
  45 
  46 public class UpdateUIRecursionTest extends JFrame implements ListCellRenderer {
  47     JComboBox combo;
  48     DefaultListCellRenderer renderer;
  49 
  50     public UpdateUIRecursionTest() {
  51         super("UpdateUIRecursionTest");
  52         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  53         setSize(400, 400);
  54 
  55         String[] listData = {
  56             "First", "Second", "Third", "Fourth", "Fifth", "Sixth"
  57         };
  58 
  59         combo = new JComboBox(listData);
  60         combo.setRenderer(this);
  61         renderer = new DefaultListCellRenderer();
  62         getContentPane().add(new JScrollPane(combo), BorderLayout.CENTER);
  63 
  64         setVisible(true);
  65     }
  66 
  67     public static void main(String[] args) throws Exception {
  68 
  69         SwingUtilities.invokeAndWait(new Runnable() {
  70 
  71             @Override
  72             public void run() {
  73                 UpdateUIRecursionTest obj = new UpdateUIRecursionTest();
  74 
  75                 obj.test();
  76 
  77                 obj.disposeUI();
  78             }
  79         });
  80     }
  81 
  82     public void test() {
  83         combo.updateUI();
  84     }
  85 
  86     public void disposeUI() {
  87         setVisible(false);
  88         dispose();
  89     }
  90 
  91     public Component getListCellRendererComponent(JList list, Object value,
  92             int index, boolean isSelected, boolean cellHasFocus)
  93     {
  94         return renderer.getListCellRendererComponent(list, value, index,
  95                                                      isSelected, cellHasFocus);
  96     }
  97 }
  98