1 /*
   2  * Copyright (c) 2009, 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 /*
  25  * @test
  26  * @key headful
  27  * @bug 6794836
  28  * @summary BasicSliderUI throws NullPointerExc when JSlider maximum is Integer.MAX_VALUE
  29  * @author Pavel Porvatov
  30  * @run main bug6794836
  31  */
  32 
  33 import javax.swing.*;
  34 import javax.swing.plaf.basic.BasicSliderUI;
  35 import java.lang.reflect.Method;
  36 import java.util.Hashtable;
  37 
  38 public class bug6794836 {
  39     public static void main(String[] args) throws Exception {
  40         new bug6794836().run();
  41     }
  42 
  43     public void run() throws Exception {
  44         JSlider slider = new JSlider(0, Integer.MAX_VALUE);
  45 
  46         slider.setPaintLabels(true);
  47 
  48         JLabel minLabel = new JLabel("Min");
  49         JLabel maxLabel = new JLabel("Max");
  50 
  51         Hashtable<Integer, JLabel> labelTable = new Hashtable<Integer, JLabel>();
  52 
  53         labelTable.put(Integer.MIN_VALUE, minLabel);
  54         labelTable.put(Integer.MAX_VALUE, maxLabel);
  55 
  56         slider.setLabelTable(labelTable);
  57 
  58         BasicSliderUI ui = (BasicSliderUI) slider.getUI();
  59 
  60         if (invokeMethod("getHighestValueLabel", ui) != maxLabel) {
  61             fail("invalid getHighestValueLabel result");
  62         }
  63 
  64         if (invokeMethod("getLowestValueLabel", ui) != minLabel) {
  65             fail("invalid getLowestValueLabel result");
  66         }
  67 
  68         System.out.println("The bug6794836 test passed");
  69     }
  70 
  71     private static Object invokeMethod(String name, BasicSliderUI ui) throws Exception {
  72         Method method = BasicSliderUI.class.getDeclaredMethod(name, null);
  73 
  74         method.setAccessible(true);
  75 
  76         return method.invoke(ui, null);
  77     }
  78 
  79     private static void fail(String s) {
  80         throw new RuntimeException("Test failed: " + s);
  81     }
  82 }