rotating a rectangle animation problem

package rotatinganimation;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.*;
import java.awt.Graphics2D;
import java.awt.geom.*;
 
public class Demo
{
Thread t1;
int degree=8;
public Demo()
{
JFrame frame=new JFrame("Tara Animation");
frame.setSize(500,500);
frame.add(new Rotate(),BorderLayout.CENTER);
frame.setVisible(true);
}
 
class Rotate extends JPanel implements Runnable
{
public void start()
{
if(t1==null)
{
t1=new Thread(this);
t1.start();
}
}
public void run()
{
for(int i=0;i<16;i++)
{
repaint();
try{
Thread.sleep(10);
}
catch(Exception ex){}
}
}
public void paint(Graphics g)
{
Graphics2D graph2=(Graphics2D)g;
graph2.setColor(Color.red);
graph2.translate(200,200);
graph2.rotate(Math.PI/Math.toRadians(degree));
Rectangle2D.Double rect=new Rectangle2D.Double(50,80,50,50);
graph2.fill(rect);
}
}
 
public static void main(String[] args)
{
Demo d=new Demo();
 
}
}