candle.java

Java课件,ppt格式

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

public class Candle extends JApplet implements Runnable{
  private boolean isStandalone = false;
  private Image[] spin;
  private int total=2;
  private int imageNumber=0;
  private Thread candle;

  public Candle() { }

  //applet初始化
  public void init() {
    spin=new Image[total];
    for(int i=0;i<total;i++)
      spin[i]=getImage(getDocumentBase(),"image/t"+i+".gif");//加载图片
  }
  public void start(){
    candle=new Thread(this);//创建线程
    candle.start();//启动线程
  }
  public void stop()
  {
    candle=null;//终止线程
  }
  public void run(){
   while(candle!=null)
    {
     repaint();
     try{
      candle.sleep(200);//休眠200毫秒，即每隔200毫秒切换一幅图片
     }catch(InterruptedException e)
       {e.printStackTrace() ;}
    }
  }
  public void paint(Graphics g){ 
    g.drawImage(spin[imageNumber],20,20,this);  //绘制当前图片
    imageNumber=++imageNumber%total;  //另图片号在0~total-1之间依次切换
  }
}