Java Graphics .getClipBounds (Rectangle r)

public Rectangle getClipBounds(Rectangle r)

//from  w  w  w .  ja  v  a  2 s . co  m
import java.awt.Graphics;
import java.awt.Rectangle;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main extends JPanel {

  public void paint(Graphics g) {
    super.paint(g);
    Rectangle r = g.getClipBounds();
    g.drawLine(0,0,r.width, r.height);

  }

  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.add(new Main());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(20,20, 500,500);
    frame.setVisible(true);
  }
}