《Java2图形设计卷II：Swing》配套光盘源码

				import java.awt.*;
				import java.awt.event.*;
				import javax.swing.*;
				
				public class Test extends JApplet {
					public Test() {
						Container contentPane = getContentPane();
						JPanel panel = new JPanel(new BorderLayout());
						JPanel controlPanel = new JPanel();
						JPanel canvas = new Canvas();
				
						canvas.setBorder(
							BorderFactory.createLineBorder(Color.black));
				
						controlPanel.add(new JLabel("Name:"));
						controlPanel.add(new JTextField(20));
				
						panel.add(controlPanel, BorderLayout.NORTH);
						panel.add(canvas, BorderLayout.CENTER);
				
						contentPane.add(panel);
					}
				}
				class Canvas extends JPanel {
					public void paintComponent(Graphics g) {
						super.paintComponent(g);
				
						Dimension size = getSize();
						g.setColor(Color.black);
						g.drawLine(50,50,size.width,size.height);
						g.drawArc(20,40,25,25,0,290);
						g.drawString("A JPanel Used as a Canvas", 20, 20);
					}
				}