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   @Override
public void update(Graphics g) 
{
if(offScreenImage == null)
{
offScreenImage = this.createImage(800, 600);
}
/*
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*/

Graphics graOffScreen = offScreenImage.getGraphics();

/*
*ÖØ»­Ðé±³¾° 
*/
Color c = graOffScreen.getColor();
graOffScreen.setColor(Color.GREEN);
graOffScreen.fillRect(150, 150, 800, 600);
graOffScreen.setColor(c);


paint(graOffScreen);

g.drawImage(offScreenImage, 0, 0, null);
}


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class A {
public d (){};
public d (q){};
public d (q,w){};
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java¶ÁÈ¡ excel Îı¾

 package javatest1014;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
public class ReadExcel{
 
 public static void main(String[] args){
  
  jxl.Workbook workbook=getWorkBook();
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