firstanimation.java

Java2游戏编程源码 第四章 很好的学习Java和简单游戏编程的书籍

// 程序：基本动画
// 范例文件：FirstAnimation.java

import java.awt.*;
import java.net.*;
import java.applet.*;

public class FirstAnimation extends Applet
{
   URL          ErrorHTML;     
   int          currentImage;  
   Image        Animation[];    
   MediaTracker MT;          

   public void init()
   {
      currentImage = 0;            
      Animation    = new Image[8];   
      MT           = new MediaTracker(this);
  
      for(int i=0;i<8;i++)         
      {
         Animation[i] 
         = getImage(getDocumentBase(),"Images/Freedom" + (i+1) + ".gif");

         MT.addImage(Animation[i],0);
      }
 
      try 
      {
         showStatus("图像载入中..."); 
         MT.waitForAll();             
      }
      catch(InterruptedException E)    
      { 
         try                    
         {
            ErrorHTML = new URL(getCodeBase().toString() + "ErrorHTML.html");
         }
         catch(MalformedURLException ME){ }

         getAppletContext().showDocument(ErrorHTML); 
      }
   }

   public void paint(Graphics g)
   {

      g.drawImage(Animation[currentImage],50,10,250,250,this);

      try
      {
         Thread.sleep(125);         
      }
      catch(InterruptedException E) 
      {
         try                        
         {
            ErrorHTML = new URL(getCodeBase().toString() + "ErrorHTML.html");
         }
         catch(MalformedURLException ME){ }

         getAppletContext().showDocument(ErrorHTML); 
      }
      
      if(currentImage == 7)        
         currentImage = 0;         
      else
         currentImage = currentImage + 1;  

      repaint();                
   }
}