ImageProcessor.java 文件源码

public static boolean hasAlpha(Image image) {

    if (image instanceof BufferedImage)
        return ((BufferedImage)image).getColorModel().hasAlpha();

    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);

    try {
        pg.grabPixels();
    }

    catch (InterruptedException e)
    {
    }

    return pg.getColorModel().hasAlpha();
}