bug6794836.java revision 14851:980da45565c8 
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
33import javax.swing.*;
34import javax.swing.plaf.basic.BasicSliderUI;
35import java.lang.reflect.Method;
36import java.util.Hashtable;
37
38public 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}
83