Scaling 2D

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;

/**
 *
 * @author mohamed

 */
public class Scaling  extends JFrame{

private int width=400;
    private int height=400;
    private int x1=50;
    private int y1=50;
    private int scale=2;
    
    public Scaling() {
         setTitle("Scaling");
         setSize(width,height);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setVisible(true);
    }
      public void paint(Graphics g) {
       g.fillRect(0,0,400,400);
       g.setColor(Color.YELLOW);
        g.drawRect(200,200,x1,y1);       
        g.setColor(Color.GREEN);
        x1*=scale;
        y1*=scale;
        g.drawRect(200,200,x1,y1);
     
    }
      public static void main(String[] args) {
        // TODO code application logic here
    new Scaling();
    }

}