test/jdk/java/awt/GraphicsDevice/HeadlessGraphicsDevice.java

/*
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 * 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.
 *
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 */

import java.awt.*;
import java.awt.image.BufferedImage;

/*
 * @test
 * @summary Check that GraphicsDevice methods do not throw unexpected
 *          exceptions in headless mode
 * @run main/othervm -Djava.awt.headless=true HeadlessGraphicsDevice
 */

public class HeadlessGraphicsDevice {
    public static void main(String args[]) {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        Graphics2D gd = ge.createGraphics(new BufferedImage(100, 100, BufferedImage.TYPE_4BYTE_ABGR));
        GraphicsConfiguration gc = gd.getDeviceConfiguration();
        GraphicsDevice gdev = gc.getDevice();

        for (GraphicsConfiguration gcl : gdev.getConfigurations())
            gcl.toString();

        gdev.getDefaultConfiguration().toString();
        gdev.getIDstring();

        if (gdev.getType() != GraphicsDevice.TYPE_IMAGE_BUFFER)
            throw new RuntimeException("Created GraphicsDevice that should be IMAGE_BUFFER but it isn't");
    }
}