MyCanvas.java

/*
 * 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.
 */

import java.awt.*;
import java.awt.event.*;

public class MyCanvas extends Canvas {

    static {
        try {
            System.loadLibrary("mylib");
        } catch (Throwable t) {
            System.out.println("Test failed!!");
            t.printStackTrace();
            System.exit(1);
        }
    }

    public native void paint(Graphics g);

    public static void main(String[] args) {
        try {
            Robot robot = new Robot();
            Frame f = new Frame();
            f.setBounds(0, 0, 100, 100);
            f.add(new MyCanvas());
            f.addWindowListener(new WindowAdapter() {
                public void windowClosing(WindowEvent ev) {
                    System.exit(0);
                }
            });
            f.setVisible(true);
            robot.delay(5000);
            Color col1 = new Color(0, 0, 0);
            Color col2 = robot.getPixelColor(f.getX()+50, f.getY()+50);
            if (col1.equals(col2)) {
                System.out.println("Test passed!");
            } else {
                throw new RuntimeException("Color of JAWT canvas is wrong or " +
                        "it was not rendered. " + "Check that other windows " +
                        "do not block the test frame.");
            }
            System.exit(0);
        } catch (Throwable t) {
            System.out.println("Test failed!");
            t.printStackTrace();
            System.exit(1);
        }
    }
}