UIUtil.java 文件源码

@Nullable
public static Color getColorAt(final Icon icon, final int x, final int y) {
  if (0 <= x && x < icon.getIconWidth() && 0 <= y && y < icon.getIconHeight()) {
    final BufferedImage image = createImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_RGB);
    icon.paintIcon(null, image.getGraphics(), 0, 0);

    final int[] pixels = new int[1];
    final PixelGrabber pixelGrabber = new PixelGrabber(image, x, y, 1, 1, pixels, 0, 1);
    try {
      pixelGrabber.grabPixels();
      return new Color(pixels[0]);
    }
    catch (InterruptedException ignored) {
    }
  }

  return null;
}