1 package test;
2 import java.awt.Color;
3 import java.awt.Font;
4 import java.awt.Frame;
5 import java.awt.Graphics;
6 import java.awt.Image;
7 import java.awt.event.WindowAdapter;
8 import java.awt.event.WindowEvent;
9 /**
10 * 测试物体沿着任意角度飞行 和停止
11 * @author Nicholas
12 *
13 */
14 public class GameFrame3 extends Frame {
15 Image img = GameUtil.getImage("picture/test3.jpg");
16
17 public void launchFrame(){
18 setSize(500,500);
19 setLocation(300,150);
20 setVisible(true);
21
22 new PaintThread().start();
23
24 addWindowListener(new WindowAdapter(){
25 public void windowClosing(WindowEvent e) {
26 System.exit(0);
27 }
28 });
29 }
30
31 private double x = 100, y = 100;
32 private double degree = 3.14/3;// 弧度：[0,2*pi];
33 private double speed = 10;//控制速率
34
35 public void paint(Graphics g) {
36 g.drawImage(img, (int)x, (int)y, null);
37 x +=speed * Math.cos(degree);
38 y +=speed * Math.sin(degree);
39 if(speed > 0){
40 speed -= 0.05;
41 }else {
42 speed = 0;
43 }
44 if(y > 500-50 || y < 30){
45 degree=-degree;
46 }
47 if(x < 0 || x >= 500-50){
48 degree=Math.PI-degree;
49 }
50 }
51
52 class PaintThread extends Thread{
53 public void run(){
54 while(true){
55 repaint();
56 try {
57 Thread.sleep(40);
58 } catch (InterruptedException e) {
59 e.printStackTrace();
60 }
61 }
62 }
63 }
64 public static void main(String[] args) {
65 GameFrame3 gf=new GameFrame3();
66 gf.launchFrame();
67 }
68 }
