Java编程——动画图标

// AnimatorIcon.java

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package newpackage;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

//动画图标

public class AnimatorIcon extends JPanel implements ActionListener {

ImageIcon[] images; //用于动画的图标数组
Timer animationTimer; 
int currentImage = 0; //当前图像编号
int delay = 500; //图像切换延迟
int width; //图像宽度
int height; //图像高度

public AnimatorIcon() //构造函数
{
setBackground(Color.white);
images = new ImageIcon[2]; //初始化数组
for (int i=0;i<images.length;i++)
images[i]=new ImageIcon(getClass().getResource("image"+i+".gif")); //实例化图标
width = images[0].getIconWidth(); //初始化宽度值
height = images[0].getIconHeight(); //初始化高度值
}

public void paintComponent(Graphics g) { //重载组件绘制方法
super.paintComponent(g); //调用父类函数
images[currentImage].paintIcon(this,g,70,0); //绘制图标
currentImage=(currentImage+1)%2; //更改当前图像编号
}

public void actionPerformed(ActionEvent actionEvent) {
repaint();
}

public void startAnimation() { //开始动画
if (animationTimer==null) {
currentImage=0; 
animationTimer=new Timer(delay, this); //实例化Timer对象
animationTimer.start(); //开始运行
} else if (!animationTimer.isRunning()) //如果没有运行
animationTimer.restart(); //重新运行
}

public void stopAnimation() { 
animationTimer.stop(); //停止动画
}

public static void main(String args[]) {
AnimatorIcon animation = new AnimatorIcon(); //实例化动画图标
JFrame frame = new JFrame("动画图标"); //实例化窗口对象
frame.getContentPane().add(animation); //增加组件到窗口上
frame.setSize(200, 100); //设置窗口尺寸
frame.setVisible(true); //设置窗口可视
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序
animation.startAnimation(); //开始动画
}

}