test/jdk/java/awt/AlphaComposite/HeadlessAlphaComposite.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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import java.awt.*;
import java.awt.image.ColorModel;

/*
 * @test
 * @summary Check no exception occurrence when running AlphaComposite getInstance(),
 *          createContext(), getAlpha(), getRule(), hashCode() methods in headless mode
 * @run main/othervm -Djava.awt.headless=true HeadlessAlphaComposite
 */

public class HeadlessAlphaComposite {

    public static void main(String args[]) {
        AlphaComposite ac;
        ac = AlphaComposite.getInstance(AlphaComposite.CLEAR);
        ac = AlphaComposite.getInstance(AlphaComposite.DST_IN);
        ac = AlphaComposite.getInstance(AlphaComposite.DST_OUT);
        ac = AlphaComposite.getInstance(AlphaComposite.DST_OVER);
        ac = AlphaComposite.getInstance(AlphaComposite.SRC);
        ac = AlphaComposite.getInstance(AlphaComposite.SRC_IN);
        ac = AlphaComposite.getInstance(AlphaComposite.SRC_OUT);
        ac = AlphaComposite.getInstance(AlphaComposite.DST_IN);
        ac = AlphaComposite.getInstance(AlphaComposite.SRC, (float) 0.5);

        ac = AlphaComposite.getInstance(AlphaComposite.SRC, (float) 0.5);
        CompositeContext cc = ac.createContext(ColorModel.getRGBdefault(),
                ColorModel.getRGBdefault(),
                new RenderingHints(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON));

        ac = AlphaComposite.getInstance(AlphaComposite.SRC, (float) 0.5);
        float alpha = ac.getAlpha();

        ac = AlphaComposite.getInstance(AlphaComposite.SRC, (float) 0.5);
        int rule = ac.getRule();

        ac = AlphaComposite.getInstance(AlphaComposite.SRC, (float) 0.5);
        int hc = ac.hashCode();
    }
}