Rotation in java

import java.awt.*;
import javax.swing.*;
import java.awt.geom.*;

public class RotationWithTransform extends JComponent {
  Shape shape;

  public RotationWithTransform() {
  shape = create();
  }
  protected Shape create() {
    float fl = 100 / 2.00f;
    return new Ellipse2D.Float(fl, fl, 2 * fl, fl);
  } 
    public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;
    AffineTransform affineTransform = AffineTransform.
        getTranslateInstance(50, 50);
    g2d.transform(affineTransform);
    g2d.setPaint(Color.red);
    g2d.draw(shape);
  g2d.transform(AffineTransform.getRotateInstance(-Math.PI / 7));

    Stroke stroke = new BasicStroke(1, BasicStroke.CAP_BUTT,
        BasicStroke.JOIN_BEVEL, 0, new float[] { 3, 1 }, 0);
    g2d.setStroke(stroke);
    g2d.draw(shape);
  }
  public static void main(String[] a) {
    JFrame frame = new JFrame("Rotate using Transform");
    frame.getContentPane().add(new RotationWithTransform());
    frame.setSize(300, 200);
    frame.show();
  }
}