Java编程——动画图标

 1 // AnimatorIcon.java
 2 
 3 /*
 4 * To change this license header, choose License Headers in Project Properties.
 5 * To change this template file, choose Tools | Templates
 6 * and open the template in the editor.
 7 */
 8 package newpackage;
 9 
10 import java.awt.*;
11 import java.awt.event.*;
12 import javax.swing.*;
13 
14 //动画图标
15 
16 public class AnimatorIcon extends JPanel implements ActionListener {
17 
18 ImageIcon[] images; //用于动画的图标数组
19 Timer animationTimer; 
20 int currentImage = 0; //当前图像编号
21 int delay = 500; //图像切换延迟
22 int width; //图像宽度
23 int height; //图像高度
24 
25 public AnimatorIcon() //构造函数
26 {
27 setBackground(Color.white);
28 images = new ImageIcon[2]; //初始化数组
29 for (int i=0;i<images.length;i++)
30 images[i]=new ImageIcon(getClass().getResource("image"+i+".gif")); //实例化图标
31 width = images[0].getIconWidth(); //初始化宽度值
32 height = images[0].getIconHeight(); //初始化高度值
33 }
34 
35 public void paintComponent(Graphics g) { //重载组件绘制方法
36 super.paintComponent(g); //调用父类函数
37 images[currentImage].paintIcon(this,g,70,0); //绘制图标
38 currentImage=(currentImage+1)%2; //更改当前图像编号
39 }
40 
41 public void actionPerformed(ActionEvent actionEvent) {
42 repaint();
43 }
44 
45 public void startAnimation() { //开始动画
46 if (animationTimer==null) {
47 currentImage=0; 
48 animationTimer=new Timer(delay, this); //实例化Timer对象
49 animationTimer.start(); //开始运行
50 } else if (!animationTimer.isRunning()) //如果没有运行
51 animationTimer.restart(); //重新运行
52 }
53 
54 public void stopAnimation() { 
55 animationTimer.stop(); //停止动画
56 }
57 
58 public static void main(String args[]) {
59 AnimatorIcon animation = new AnimatorIcon(); //实例化动画图标
60 JFrame frame = new JFrame("动画图标"); //实例化窗口对象
61 frame.getContentPane().add(animation); //增加组件到窗口上
62 frame.setSize(200, 100); //设置窗口尺寸
63 frame.setVisible(true); //设置窗口可视
64 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序
65 animation.startAnimation(); //开始动画
66 }
67 
68 }
AnimatorIcon.java