import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.LookupOp;
import java.awt.image.ShortLookupTable;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
public void paint(Graphics g) {
short[] invert = new short[256];
for (int i = 0; i < invert.length; i++)
invert[i] = (short) (255 - i);
BufferedImageOp invertOp = new LookupOp(new ShortLookupTable(0, invert), null);
BufferedImage clone = invertOp.filter(createImage(), null);
g.drawImage(clone, 20,20,this);
}
private BufferedImage createImage(){
BufferedImage bufferedImage = new BufferedImage(200,200,BufferedImage.TYPE_INT_RGB);
Graphics g = bufferedImage.getGraphics();
g.drawString("www.rntsoft.com", 20,20);
return bufferedImage;
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new MainClass());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200, 200);
frame.setVisible(true);
}
}