import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.RGBImageFilter;
import javax.swing.ImageIcon;
class GetRedFilter extends RGBImageFilter {
public GetRedFilter() {
canFilterIndexColorModel = true;
}
public int filterRGB(int x, int y, int rgb) {
if (x == -1) {
}
return rgb & 0xffff0000;
}
}
public class Main {
public static void main(String[] argv) throws Exception {
Image image = new ImageIcon("image.gif").getImage();
ImageFilter filter = new GetRedFilter();
FilteredImageSource filteredSrc = new FilteredImageSource(image.getSource(), filter);
image = Toolkit.getDefaultToolkit().createImage(filteredSrc);
}
}