屏幕截图的程序(Java)

import java.io.*;
import javax.imageio.*;
import java.awt.*;
class test1
{
 public static void main(String args[]) throws Exception
 {
  java.awt.Robot r = new java.awt.Robot();
  java.awt.image.BufferedImage buf = r.createScreenCapture(new Rectangle(0,0,100,100));//截屏的坐标

  //下面便是保存图像为jpeg格式
  FileOutputStream out = new FileOutputStream("E://test.jpg");
  com.sun.image.codec.jpeg.JPEGImageEncoder en = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(out);
  en.encode(buf);
  out.close();
 }
}