import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class Draw2D extends JFrame {
 public Draw2D(){
   super("繪制二維圖形");
   setSize(370,160);
   setVisible(true);
 }
 public void paint(Graphics g) {
   super.paint(g);
   Graphics2D canvars =(Graphics2D)g;
   canvars.setPaint(Color.DARK_GRAY);
   canvars.setStroke(new BasicStroke(6.0f));
   canvars.draw(new Arc2D.Double(10,50,70,90,0,270,Arc2D.PIE));    
   canvars.setPaint(Color.GRAY);
   canvars.fill(new Ellipse2D.Double(90,50,70,90));
   canvars.setPaint(Color.green);
   canvars.draw(new Line2D.Double(180,50,180,130));
   canvars.setPaint(Color.MAGENTA);
   canvars.setStroke(new BasicStroke(10.0f));
   canvars.draw(new Rectangle2D.Double(200,60,60,60)); 
   canvars.setPaint(Color.ORANGE);
   canvars.fill(new RoundRectangle2D.Double(280,60,60,60,50,50)); 
 }
 public static void main(String args[]) {
	Draw2D app = new Draw2D();
    app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
 }
}