Clip between Rectangle and Ellipse2D : Clip « 2D Graphics « Java Tutorial

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

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.Ellipse2D;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class ClipBetweenRectangleEllipse2D extends JFrame {
  public ClipBetweenRectangleEllipse2D() {
    getContentPane().add(new DrawingCanvas());
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(500, 500);
    setVisible(true);
  }

  public static void main(String arg[]) {
    new ClipBetweenRectangleEllipse2D();
  }
}

class DrawingCanvas extends JPanel {
  DrawingCanvas() {
    setSize(300, 300);
    setBackground(Color.white);
  }

  public void paint(Graphics g) {
    Graphics2D g2D = (Graphics2D) g;

    Graphics2D g2 = (Graphics2D) g;

    int w = getSize().width;
    int h = getSize().height;
    Ellipse2D e = new Ellipse2D.Float(w / 4.0f, h / 4.0f, w / 2.0f, h / 2.0f);
    g2.setClip(e);

    g2.setColor(Color.red);
    g2.fillRect(0, 0, w, h);

    Rectangle r = new Rectangle(w/2, h/2, w/2, h/2);
    g2.clip(r);

    g2.setColor(Color.green);
    g2.fillRect(0, 0, w, h);

  }
}

16.40.Clip
	16.40.1.	Clip Demo
	16.40.2.	Clip between Rectangle and Ellipse2D
	16.40.3.	Animate a clipping path to reveal different portions of an image
	16.40.4.	A clipping area can also be created from a text string.
	16.40.5.	Setting the Clipping Area with a Shape
	16.40.6.	Clipping is restricting of drawing to a certain area.