Java example source code file (Test1.java)

This example Java source code file (Test1.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

arraylist, awt, awteventlistener, component, error, event, focuslistener, gui, jbutton, jframe, list, override, robot, runtimeexception, string, swing, test, util

The Test1.java Java example source code

/*
 * Copyright (c) 2012, 2013, 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     6981400
 * @summary Tabbing between textfiled do not work properly when ALT+TAB
 * @author  anton.tarasov
 * @library ../../regtesthelpers
 * @build   Util
 * @run     main Test1
 */

// This test shows a frame with four focusable components: b0, b1, b2, b3.
// Then it presses Tab three times. EDT is freezed for a while on the first FOCUS_LOST event.
// Meantime, the test clicks in a component of another frame and then clicks in the title
// of the original frame. When EDT awakes and all the queued events get processed,
// the other frame should ones gain focus and then pass it to the original frame.
// The b3 component of the orinial frame should finally become a focus owner.
// The FOCUS_LOST/FOCUS_GAINED events order in the original frame is tracked and should be:
// b0 -> b1 -> b2 -> b3.

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.swing.*;
import test.java.awt.regtesthelpers.Util;

public class Test1 {
    static JFrame f0 = new JFrame("base_frame") { public String getName() {return "base_frame";} };
    static JButton f0b0 = new JB("b0");
    static JButton f0b1 = new JB("b1");
    static JButton f0b2 = new JB("b2");
    static JButton f0b3 = new JB("b3");

    static JFrame f1 = new JFrame("swing_frame") { public String getName() {return "swing_frame";} };
    static JButton f1b0 = new JButton("button");

    static Frame f2 = new Frame("awt_frame") { public String getName() {return "awt_frame";} };
    static Button f2b0 = new Button("button");

    static Robot robot;

    static List<Component> gainedList = new ArrayList();
    static List<Component> lostList = new ArrayList();

    static Component[] refGainedList = new Component[] {f0b1, f0b2, f0b3, f0b3};
    static Component[] refLostList = new Component[] {f0b0, f0b1, f0b2, f0b3};

    static boolean tracking;

    public static void main(String[] args) {
        Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {
            public void eventDispatched(AWTEvent e) {
                System.out.println(e);
            }
        }, FocusEvent.FOCUS_EVENT_MASK | WindowEvent.WINDOW_EVENT_MASK);

        try {
            robot = new Robot();
        } catch (AWTException ex) {
            throw new RuntimeException("Error: can't create Robot");
        }

        f0.add(f0b0);
        f0.add(f0b1);
        f0.add(f0b2);
        f0.add(f0b3);
        f0.setLayout(new FlowLayout());
        f0.setBounds(0, 100, 400, 200);

        f1.add(f1b0);
        f1.setBounds(0, 400, 400, 200);

        f2.add(f2b0);
        f2.setBounds(0, 400, 400, 200);

        f0b0.addFocusListener(new FocusAdapter() {
            @Override
            public void focusLost(FocusEvent e) {
                try {
                    Thread.sleep(1000);
                } catch (Exception ex) {}
            }
        });

        //
        // Case 1. Test against swing JFrame.
        //

        f1.setVisible(true);
        f0.setVisible(true);

        Util.waitForIdle(robot);

        if (!f0b0.isFocusOwner()) {
            Util.clickOnComp(f0b0, robot);
            Util.waitForIdle(robot);
            if (!f0b0.isFocusOwner()) {
                throw new RuntimeException("Error: can't focus the component " + f0b0);
            }
        }

        System.out.println("\nTest case 1: swing frame\n");
        test(f1b0);

        //
        // Case 2. Test against awt Frame.
        //

        tracking = false;
        gainedList.clear();
        lostList.clear();

        f1.dispose();
        f2.setAutoRequestFocus(false);
        f2.setVisible(true);
        Util.waitForIdle(robot);

        Util.clickOnComp(f0b0, robot);
        Util.waitForIdle(robot);
        if (!f0b0.isFocusOwner()) {
            throw new RuntimeException("Error: can't focus the component " + f0b0);
        }

        System.out.println("\nTest case 2: awt frame\n");
        test(f2b0);

        System.out.println("\nTest passed.");
    }

    public static void test(Component compToClick) {
        tracking = true;

        robot.keyPress(KeyEvent.VK_TAB);
        robot.delay(50);
        robot.keyRelease(KeyEvent.VK_TAB);
        robot.delay(50);

        robot.keyPress(KeyEvent.VK_TAB);
        robot.delay(50);
        robot.keyRelease(KeyEvent.VK_TAB);
        robot.delay(50);

        robot.keyPress(KeyEvent.VK_TAB);
        robot.delay(50);
        robot.keyRelease(KeyEvent.VK_TAB);

        robot.delay(50);
        Util.clickOnComp(compToClick, robot);

        robot.delay(50);
        Util.clickOnTitle(f0, robot);

        Util.waitForIdle(robot);

        if (!f0b3.isFocusOwner()) {
            throw new RuntimeException("Test failed: f0b3 is not a focus owner");
        }

        if (!"sun.awt.X11.XToolkit".equals(Toolkit.getDefaultToolkit().getClass().getName())) {

            if (!Arrays.asList(refGainedList).equals(gainedList)) {
                System.out.println("gained list: " + gainedList);
                throw new RuntimeException("Test failed: wrong FOCUS_GAINED events order");
            }
            if (!Arrays.asList(refLostList).equals(lostList)) {
                System.out.println("lost list: " + lostList);
                throw new RuntimeException("Test failed: wrong FOCUS_LOST events order");
            }
        }
    }
}

class JB extends JButton {
    String name;

    public JB(String name) {
        super(name);
        this.name = name;

        addFocusListener(new FocusListener() {
            public void focusGained(FocusEvent e) {
                if (Test1.tracking)
                    Test1.gainedList.add(e.getComponent());
            }

            public void focusLost(FocusEvent e) {
                if (Test1.tracking)
                    Test1.lostList.add(e.getComponent());
            }
        });
    }

    public String toString() {
        return "[" + name + "]";
    }
}