1 /*
   2  * Copyright (c) 2016, 2017, 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 /**
  25  * @test
  26  * @key headful
  27  * @bug 6567433
  28  *
  29  * @summary  JComboBox.updateUI() invokes updateUI() on its cellrenderer via
  30  * SwingUtilities.updateComponentTreeUI().
  31  * If the cellrenderer is a parent of this JComboBox the method recurses
  32  * endless.
  33  * This test tests that the fix is effective in avoiding recursion.
  34  *
  35  * @run main/othervm UpdateUIRecursionTest
  36  */
  37 
  38 import java.awt.BorderLayout;
  39 import java.awt.Component;
  40 import javax.swing.DefaultListCellRenderer;
  41 import javax.swing.JComboBox;
  42 import javax.swing.JFrame;
  43 import javax.swing.JList;
  44 import javax.swing.JScrollPane;
  45 import javax.swing.ListCellRenderer;
  46 import javax.swing.SwingUtilities;
  47 
  48 public class UpdateUIRecursionTest extends JFrame implements ListCellRenderer {
  49     JComboBox combo;
  50     DefaultListCellRenderer renderer;
  51 
  52     public UpdateUIRecursionTest() {
  53         super("UpdateUIRecursionTest");
  54         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  55         setSize(400, 400);
  56 
  57         String[] listData = {
  58             "First", "Second", "Third", "Fourth", "Fifth", "Sixth"
  59         };
  60 
  61         combo = new JComboBox(listData);
  62         combo.setRenderer(this);
  63         renderer = new DefaultListCellRenderer();
  64         getContentPane().add(new JScrollPane(combo), BorderLayout.CENTER);
  65 
  66         setVisible(true);
  67     }
  68 
  69     public static void main(String[] args) throws Exception {
  70 
  71         SwingUtilities.invokeAndWait(new Runnable() {
  72 
  73             @Override
  74             public void run() {
  75                 UpdateUIRecursionTest obj = new UpdateUIRecursionTest();
  76 
  77                 obj.test();
  78 
  79                 obj.disposeUI();
  80             }
  81         });
  82     }
  83 
  84     public void test() {
  85         combo.updateUI();
  86     }
  87 
  88     public void disposeUI() {
  89         setVisible(false);
  90         dispose();
  91     }
  92 
  93     public Component getListCellRendererComponent(JList list, Object value,
  94             int index, boolean isSelected, boolean cellHasFocus)
  95     {
  96         return renderer.getListCellRendererComponent(list, value, index,
  97                                                      isSelected, cellHasFocus);
  98     }
  99 }
 100