1 package PartOfConstruct;
 2 import java.awt.Graphics;
 3 import java.awt.event.KeyAdapter;
 4 import java.awt.event.KeyEvent;
 5 import java.awt.image.BufferedImage;
 6 import java.io.IOException;
 7 import java.util.Timer;
 8 import java.util.TimerTask;
 9 import javax.imageio.ImageIO;
10 import javax.swing.JFrame;
11 import javax.swing.JPanel;
12 public class partOne extends JPanel{
13     public static BufferedImage bg;
14     static{
15         try {
16             bg =ImageIO.read(partOne.class.getResource("bg.png"));
17         } catch (IOException e) {
18             // 加载图片的异常处理
19             e.printStackTrace();
20         }
21     }
22         int x=5,y=5;
23         public void paint(Graphics g) {
24             g.drawImage(bg, 0,0, null);
25             g.fillOval(x, y, 20, 20);
26             x+=5;
27             y+=5;
28         }
29         public void moving(){
30             this.addKeyListener(new KeyAdapter() {
31                 public void keyPressed(KeyEvent e) {
32                     System.out.println("按下"+e.getKeyCode());
33                 }
34                 
35                 public void keyReleased(KeyEvent e) {
36                     System.out.println("弹起"+e.getKeyCode());
37                 }
38             });
39 }
40         public void Ationn(){
41             Timer timer = new Timer();
42             timer.scheduleAtFixedRate(new TimerTask() {
43                 public void run() {
44                     moving();
45                     repaint();
46                 }
47             }, 100, 1000);
48         }
49         public static void main(String[] args) {
50             JFrame jj = new JFrame();
51             partOne pp = new partOne();
52             jj.setVisible(true);
53             jj.setSize(500, 500);
54             jj.setResizable(false);//锁定窗口的大小不可随意拉动
55             jj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭窗口
56             jj.setLocation(200, 50);
57             jj.add(pp);
58             pp.Ationn();
59             pp.moving();
60         }
62 }