Java Circle Animation

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class CircleAnimation {
  public static void main(String[] args) {
    CircleFrame c = new CircleFrame();
    c.setVisible(true);
  }
}

class CircleFrame extends Frame {
  private static final long serialVersionUID = 1L;
  private final int width = 800, height = 800;

  public CircleFrame() {
    setSize(width, height);
    setTitle("CircleAnimation");
    addWindowListener(new WindowAdapter() {
      @Override
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    Circle canvas = new Circle();
    add(canvas, BorderLayout.CENTER);
  }
}

class Circle extends Canvas implements Runnable {
  private static final long serialVersionUID = 1L;
  private final int c1 = 200 , c2 = 50, c3 = 20;
  private final int width = 700, height = 700;
  private double theta1 = 0., theta2 = 0.;

  public Circle() {
    setSize(width, height);
    new Thread(this).start();
  }

  @Override
  public void paint(Graphics g) {
    g.translate(350, 350);
    g.drawOval(-c1, -c1, 2 * c1, 2 * c1);
    double x1 = (c1 + c2) * Math.cos(theta1);
    double y1 = (c1 + c2) * Math.sin(theta1);
    g.drawOval((int )(x1 - c2), (int )(y1 - c2), 2 * c2, 2 * c2);
    double x2 = x1 + (c2 + c3) * Math.cos(theta2);
    double y2 = y1 + (c2 + c3) * Math.sin(theta2);
    g.drawOval((int )(x2 - c3), (int )(y2 - c3), 2 * c3, 2 * c3);
  }

  @Override
  public void run() {
    while (true) {
      theta1 += Math.PI / 180 * 5;
      theta2 -= Math.PI / 180 * 19;
      repaint();
      try {
        Thread.sleep(100);
      }
      catch (Exception e) {
      }
    }
  }
}