Java example source code file (bug4865918.java)

This example Java source code file (bug4865918.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, dimension, error, event, exception, gui, jframe, jscrollbar, mouseevent, override, runnable, suntoolkit, swing, testscrollbar, the, util

The bug4865918.java Java example source code

/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 4865918
 * @summary REGRESSION:JCK1.4a-runtime api/javax_swing/interactive/JScrollBarTests.html#JScrollBar
 * @author Andrey Pikalev
 * @run main bug4865918
 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import sun.awt.SunToolkit;

public class bug4865918 {

    private static TestScrollBar sbar;

    public static void main(String[] argv) throws Exception {
        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {
                createAndShowGUI();
            }
        });

        toolkit.realSync();

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override
            public void run() {
                sbar.pressMouse();
            }
        });

        toolkit.realSync();

        int value = getValue();

        if (value != 9) {
            throw new Error("The scrollbar block increment is incorect");
        }
    }

    private static int getValue() throws Exception {
        final int[] result = new int[1];

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                result[0] = sbar.getValue();
            }
        });

        return result[0];
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame("bug4865918");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        sbar = new TestScrollBar(JScrollBar.HORIZONTAL, -1, 10, -100, 100);
        sbar.setPreferredSize(new Dimension(200, 20));
        sbar.setBlockIncrement(10);

        frame.getContentPane().add(sbar);
        frame.pack();
        frame.setVisible(true);

    }

    static class TestScrollBar extends JScrollBar {

        public TestScrollBar(int orientation, int value, int extent,
                int min, int max) {
            super(orientation, value, extent, min, max);

        }

        public void pressMouse() {
            MouseEvent me = new MouseEvent(sbar,
                    MouseEvent.MOUSE_PRESSED,
                    (new Date()).getTime(),
                    MouseEvent.BUTTON1_MASK,
                    3 * getWidth() / 4, getHeight() / 2,
                    1, true);
            processMouseEvent(me);
        }
    }
}