import java.awt.image.BufferedImage;
public class Main {
public static void main(String[] argv) throws Exception {
BufferedImage bufferedImage = new BufferedImage(200, 200,
BufferedImage.TYPE_INT_RGB);
int rgb = bufferedImage.getRGB(1, 1);
int w = bufferedImage.getWidth(null);
int h = bufferedImage.getHeight(null);
int[] rgbs = new int[w * h];
bufferedImage.getRGB(0, 0, w, h, rgbs, 0, w);
rgb = 0xFF00FF00; // green
bufferedImage.setRGB(1, 1, rgb);
}
}