制作奥运五环

package com.lzw;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class DrawWindow extends JFrame {
private JPanel panel;
public static void main(String args[]) {
try {
DrawWindow frame = new DrawWindow();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
public DrawWindow() {
super();
setBounds(100, 100, 458, 357);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().add(getPanel(), BorderLayout.CENTER);
//
}
protected JPanel getPanel() {
if (panel == null) {
panel = new MyPanel();
}
return panel;
}
}

package com.lzw;
import java.awt.*;
import java.util.Date;
import javax.swing.JPanel;
public class MyPanel extends JPanel {
private static final int OVAL_WIDTH = 150;
private static final int OVAL_HEIGHT = 150;

public MyPanel() {
super();
//
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(new BasicStroke(4.0F));
g2.setColor(Color.BLUE);
g2.drawOval(10, 10, OVAL_WIDTH, OVAL_HEIGHT); // 绘制第1个圆形
g2.setStroke(new BasicStroke(8.0F));
g2.setColor(Color.CYAN);
g2.drawOval(130, 10, OVAL_WIDTH, OVAL_HEIGHT); // 绘制第2个圆形
g2.setStroke(new BasicStroke(2.0F));
g2.setColor(Color.GREEN);
g2.drawOval(250, 10, OVAL_WIDTH, OVAL_HEIGHT); // 绘制第3个圆形
g2.setStroke(new BasicStroke(5.0F));
g2.setColor(Color.MAGENTA);
g2.drawOval(70, 120, OVAL_WIDTH, OVAL_HEIGHT); // 绘制第4个圆形
g2.setStroke(new BasicStroke(9.0F));
g2.setColor(Color.ORANGE);
g2.drawOval(190, 120, OVAL_WIDTH, OVAL_HEIGHT); // 绘制第5个圆形
Date now = new Date(2008-1900,7,8);
String nowStr = String.format("%tY年%tm月%td日", new Date[]{now, now, now});
Font font = new Font("宋体",Font.BOLD,14);
g2.setFont(font);
g2.drawString(nowStr, 80, 300);
}

}