Create an ellipse, and then draws it several times at different rotations : Ellipse « 2D Graphics « Java Tutorial

1. Java Tutorial
2. 2D Graphics
3. Ellipse

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class RotateStrokeEllipse extends JFrame {
  public static void main(String[] args) {
    new RotateStrokeEllipse();
  }

  public RotateStrokeEllipse() {
    this.setSize(300, 300);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.add(new PaintSurface(), BorderLayout.CENTER);
    this.setVisible(true);
  }

  private class PaintSurface extends JComponent {
    public PaintSurface() {
    }

    public void paint(Graphics g) {
      Graphics2D g2 = (Graphics2D) g;
      int x = 50;
      int y = 75;
      int width = 200;
      int height = 100;
      Shape r1 = new Ellipse2D.Float(x, y, width, height);
      for (int angle = 0; angle <= 360; angle += 45) {
        g2.rotate(Math.toRadians(angle), x + width / 2, y + height / 2);
        g2.setPaint(Color.YELLOW);
        g2.fill(r1);
        g2.setStroke(new BasicStroke(4));
        g2.setPaint(Color.BLACK);
        g2.draw(r1);
      }
    }
  }
}

16.16.Ellipse
	16.16.1.	Create an ellipse, and then draws it several times at different rotations
	16.16.2.	Draw Ellipse2D.Float
	16.16.3.	Create an complex shape by rotating an ellipse.
	16.16.4.	Compares two ellipses and returns true if they are equal or both null.