package chap12;

import javax.swing.*;import java.awt.*;public class Animate { int x = 1; int y = 1; public static void main (String[] args) { Animate gui = new Animate (); gui.go(); } public void go() { JFrame frame = new JFrame(); frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); MyDrawP drawP = new MyDrawP(); frame.getContentPane().add(drawP); frame.setSize(500,270); frame.setVisible(true); for (int i = 0; i < 124; i++,x++,y++ ) { x++; drawP.repaint(); try { Thread.sleep(50); } catch(Exception ex) { } } } class MyDrawP extends JPanel { public void paintComponent(Graphics g ) { g.setColor(Color.white); g.fillRect(0,0,500,250); g.setColor(Color.blue); g.fillRect(x,y,500-x*2,250-y*2); } }

}