testanimation.java

JAVA初学者的小程序

import java.awt.*;
import java.awt.image.*;
import java.applet.*;

public class testAnimation extends Applet implements Runnable{
private Image img1;
private Image img2;
private boolean blRun;
private int intWidth;
private int intHeight;
private Graphics g;
private Thread runner;

public void init(){
intWidth =getSize().width;
intHeight =getSize().height;
g=getGraphics();

img1=getImage(getCodeBase(),"img1.gif");
img2=getImage(getCodeBase(),"img2.gif");
MediaTracker mt=new MediaTracker(this);
mt.addImage(img1,1);
try{
mt.waitForAll();
}
catch(Exception e){}
blRun=false;
}


public void paint(Graphics g){
if(!blRun){
g.drawImage(img1,0,0,this);
Font f=new Font("Monospaced",Font.ITALIC,48);
g.setFont(f);
g.setColor(Color.WHITE);
g.drawString("this is a test",50,300);
}
}

public void start(){
if(runner==null){
runner=new Thread(this);
runner.start();
}
}


public void run(){
blRun=true;
while(true){
for(int i=intWidth;i>=0;i--){
g.drawImage(img1,0,0,i,intHeight,this);
g.drawImage(img2,i,0,intWidth-i,intHeight,this);
repaint();
}

for(int i=intWidth;i>=0;i--){
g.drawImage(img2,0,0,i,intHeight,this);
g.drawImage(img1,i,0,intWidth-i,intHeight,this);
repaint();
}
}
}
}