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

//動(dòng)畫圖標(biāo)

public class AnimatorIcon extends JPanel implements ActionListener {

	ImageIcon[] images; //用于動(dòng)畫的圖標(biāo)數(shù)組
	Timer animationTimer; 
	int currentImage = 0; //當(dāng)前圖像編號(hào)
	int delay = 500;  //圖像切換延遲
	int width; //圖像寬度
	int height; //圖像高度

	public AnimatorIcon() //構(gòu)造函數(shù)
	{
		setBackground(Color.white);
		images = new ImageIcon[2]; //初始化數(shù)組
		for (int i=0;i<images.length;i++)
			images[i]=new ImageIcon(getClass().getResource("image"+i+".gif")); //實(shí)例化圖標(biāo)
		width = images[0].getIconWidth(); //初始化寬度值
		height = images[0].getIconHeight(); //初始化高度值
	}

	public void paintComponent(Graphics g) { //重載組件繪制方法
		super.paintComponent(g); //調(diào)用父類函數(shù)
		images[currentImage].paintIcon(this,g,70,0); //繪制圖標(biāo)
		currentImage=(currentImage+1)%2; //更改當(dāng)前圖像編號(hào)
	}

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

	public void startAnimation() { //開始動(dòng)畫
		if (animationTimer==null) {
			currentImage=0; 
			animationTimer=new Timer(delay, this);  //實(shí)例化Timer對(duì)象
			animationTimer.start(); //開始運(yùn)行
		} else if (!animationTimer.isRunning()) //如果沒有運(yùn)行
			animationTimer.restart(); //重新運(yùn)行
	}

	public void stopAnimation() { 
		animationTimer.stop();  //停止動(dòng)畫
	}

	public static void main(String args[]) {
		AnimatorIcon animation = new AnimatorIcon(); //實(shí)例化動(dòng)畫圖標(biāo)
		JFrame frame = new JFrame("動(dòng)畫圖標(biāo)"); //實(shí)例化窗口對(duì)象
		frame.getContentPane().add(animation);  //增加組件到窗口上
		frame.setSize(200, 100); //設(shè)置窗口尺寸
		frame.setVisible(true); //設(shè)置窗口可視
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //關(guān)閉窗口時(shí)退出程序
		animation.startAnimation(); //開始動(dòng)畫
	}

}