Java Example Of Moving Circle

import java.applet.*;
import java.awt.*;
import java.awt.color.*;
/*<applet code="movinovel.class" width=400 height=200>
 * </applet>
 * */

public class movingovel extends Applet implements Runnable
{
Thread t;
int x=0;
int y=0;
public void start()
{
t=new Thread(this);
t.start();
}
public void paint(Graphics g)
{
setSize(2000,2000);
g.fillOval(x,10,100,100);
}
public void run()
{
try
{
for(;;)
{
for(;;)
{
if(y==360)
{
y=0;
break;
}
else
{
x=x+20;
y=y+20;
Thread.sleep(200);
repaint();
}
}
for(;;)
{
if(y==360)
{
y=0;
break;
}
else
{
x=x-20;
y=y+20;
Thread.sleep(200);
repaint();
}
}
run();
}
}
catch(InterruptedException e)
{

}
}

}