Java example source code file (bug4278839.java)

This example Java source code file (bug4278839.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

aqua, awt, bug, event, exception, gui, jframe, jscrollpane, jtextarea, override, rectangle, robot, runnable, runtimeexception, suntoolkit, swing, test

The bug4278839.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 Jan 16, 2003
 * @bug 4278839
 * @summary Incorrect cursor movement between words at the end of line
 * @author Anton Nashatyrev
 * @library ../../../regtesthelpers
 * @build Util
 * @run main bug4278839
 */

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

public class bug4278839 extends JFrame {

    private static boolean passed = true;
    private static JTextArea area;
    private static Robot robo;
    private static SunToolkit toolkit;

    public static void main(String[] args) {
        try {

            toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
            robo = new Robot();
            robo.setAutoDelay(100);

            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    createAndShowGUI();
                }
            });

            toolkit.realSync();

            clickMouse();
            toolkit.realSync();


            if ("Aqua".equals(UIManager.getLookAndFeel().getID())) {
                Util.hitKeys(robo, KeyEvent.VK_HOME);
            } else {
                Util.hitKeys(robo, KeyEvent.VK_CONTROL, KeyEvent.VK_HOME);
            }
            toolkit.realSync();

            passed &= moveCaret(true) == 1;
            passed &= moveCaret(true) == 5;
            passed &= moveCaret(true) == 8;
            passed &= moveCaret(true) == 9;
            passed &= moveCaret(true) == 13;
            passed &= moveCaret(true) == 16;
            passed &= moveCaret(true) == 17;
            passed &= moveCaret(false) == 16;
            passed &= moveCaret(false) == 13;
            passed &= moveCaret(false) == 9;
            passed &= moveCaret(false) == 8;
            passed &= moveCaret(false) == 5;
            passed &= moveCaret(false) == 1;
            passed &= moveCaret(false) == 0;

        } catch (Exception e) {
            throw new RuntimeException("Test failed because of an exception:",
                    e);
        }

        if (!passed) {
            throw new RuntimeException("Test failed.");
        }
    }

    private static int moveCaret(boolean right) throws Exception {
        Util.hitKeys(robo, getCtrlKey(),
                right ? KeyEvent.VK_RIGHT : KeyEvent.VK_LEFT);
        toolkit.realSync();

        final int[] result = new int[1];

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override
            public void run() {
                result[0] = area.getCaretPosition();
            }
        });

        int pos = result[0];
        return pos;
    }

    private static void clickMouse() throws Exception {
        final Rectangle result[] = new Rectangle[1];

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                result[0] = new Rectangle(area.getLocationOnScreen(), area.getSize());
            }
        });

        Rectangle rect = result[0];

        robo.mouseMove(rect.x + rect.width / 2, rect.y + rect.width / 2);
        robo.mousePress(InputEvent.BUTTON1_MASK);
    }

    /**
     * Gets a control key related to the used Look & Feel
     * Returns VK_ALT for Aqua and VK_CONTROL for others
     */
    public static int getCtrlKey() {

        if ("Aqua".equals(UIManager.getLookAndFeel().getID())) {
            return KeyEvent.VK_ALT;
        }

        return KeyEvent.VK_CONTROL;
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame();
        frame.setTitle("Bug# 4278839");
        frame.setSize(200, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        area = new JTextArea("\naaa bbb\nccc ddd\n");
        frame.getContentPane().add(new JScrollPane(area));
        frame.setVisible(true);
    }
}