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;
import java.util.Timer;
import java.util.TimerTask;

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
 * @version 1.0
 *
 *********************************************************************/
public class GuiCamera extends TimerTask {
 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 dimension = 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;

 }

 /****************************************************************
  * 本构造支持JPG和PNG文件的存储
  * @param s the surname of the snapshot file
  * @param format the format of the  image file,
  * it can be "jpg" or "png"
  ****************************************************************/
 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) dimension
       .getWidth(), (int) dimension.getHeight()));

   // 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 + "." + 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 void run() {
  snapShot();
 }

 public static void main(String[] args) {
  Timer timer = new Timer();
  int fileNumber = 0;
  timer.schedule(new GuiCamera("C://11//Hello" + ++fileNumber, "png"), 0,
    10000);
 }
}