Java 实现截屏

import java.awt.Dimension; 
 import java.awt.Rectangle; 
 import java.awt.Robot; 
 import java.awt.Toolkit; 
 import java.awt.image.BufferedImage; 
 import java.io.File; <p>import javax.imageio.ImageIO; 
  
/******************************************************************* 
* 该JavaBean可以直接在其他Java应用程序中调用，实现屏幕的"拍照" 
* This JavaBean is used to snapshot the GUI in a 
* Java application! You can embeded 
* it in to your java application source code, and us 
* it to snapshot the right GUI of the application 
* @see javax.ImageIO 
* @author liluqun (<a href='mailto:[e-mail]'>[e-mail]</a>) 
* @version 1.0 
* 
*****************************************************/ 
  
public class GuiCamera 
 { 
 private String fileName; //文件的前缀 
 private String defaultName = "GuiCamera"; 
 static int serialNum=0; 
 private String imageFormat; //图像文件的格式 
 private String defaultImageFormat="png"; 
 Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); 
  
/**************************************************************** 
* 默认的文件前缀为GuiCamera，文件格式为PNG格式 
* The default construct will use the default 
* Image file surname "GuiCamera", 
* and default image format "png" 
****************************************************************/ 
 public GuiCamera() { 
 fileName = defaultName; 
 imageFormat=defaultImageFormat; 
  
 } 
  
/**************************************************************** 
* @param s the surname of the snapshot file 
* @param format the format of the image file, 
* it can be "jpg" or "png" 
* 本构造支持JPG和PNG文件的存储 
****************************************************************/ 
 public GuiCamera(String s,String format) { 
  
 fileName = s; 
 imageFormat=format; 
 } 
  
 /**************************************************************** 
* 对屏幕进行拍照 
* snapShot the Gui once 
****************************************************************/ 
 public void snapShot() { 
  
 try { 
 //拷贝屏幕到一个BufferedImage对象screenshot 
 BufferedImage screenshot = (new Robot()).createScreenCapture(new 
 Rectangle(0, 0, (int) d.getWidth(), (int) d.getHeight())); 
 serialNum++; 
 //根据文件前缀变量和文件格式变量，自动生成文件名 
 String name=fileName+String.valueOf(serialNum)+"."+imageFormat; 
 File f = new File(name); 
 System.out.print("Save File "+name); 
 //将screenshot对象写入图像文件 
 ImageIO.write(screenshot, imageFormat, f); 
 System.out.print("..Finished!n"); 
 } 
 catch (Exception ex) { 
 System.out.println(ex); 
 } 
 } 
  
public static void main(String[] args) 
 { 
 GuiCamera cam= new GuiCamera("d:\Hello", "png");// 
  
cam.snapShot(); 
 } 
 }