Java Implementation screen capture Remote Desktop control

The main use of the Java.util.Robot class to capture the screen, you can achieve a rectangular area of the screen capture, through this class, we can also implement a Remote Desktop control program.

package com.qiu.util;


import java.io.*;


import java.net.*;


import javax.swing.*;


import java.awt.*;


import java.awt.event.*;


import java.awt.image.*;


import javax.imageio.*;


import java.io.*;


/** @Author Qiu_baichao


* A simple screen capture


*


**/


public class Screencapture {


//test Main


public static void Main (string[] args) throws exception{


String Userdir = System.getproperty ("User.dir");


file Tempfile = new file ("D:", "temp.png");


screencapture capture = screencapture.getinstance ();


Capture.captureimage ();


JFrame frame = new JFrame ();


JPanel panel = new JPanel ();


Panel.setlayout (New BorderLayout ());


JLabel imagebox = new JLabel ();


Panel.add (Borderlayout.center,imagebox);


Imagebox.seticon (Capture.getpickedicon ());


Capture.savetofile (tempfile);


Capture.captureimage ();


Imagebox.seticon (Capture.getpickedicon ());


Frame.setcontentpane (panel);


frame.setsize (400,300);


frame.show ();


System.out.println ("over");


}


private Screencapture () {


try{


robot = new Robot ();


}


catch (Awtexception e) {


System.err.println ("Internal Error:" + e);


E.printstacktrace ();


}


JPanel cp = (JPanel) dialog.getcontentpane ();


cp.setlayout (New BorderLayout ());


Labfullscreenimage.addmouselistener (New Mouseadapter () {


public void mousereleased (MouseEvent evn) {


Isfirstpoint = true;


pickedimage = Fullscreenimage.getsubimage (Recx,recy,recw,rech);


dialog.setvisible (FALSE);


}


});


Labfullscreenimage.addmousemotionlistener (New Mousemotionadapter () {


public void mousedragged (MouseEvent evn) {


if (isfirstpoint) {


x1 = Evn.getx ();


y1 = evn.gety ();


Isfirstpoint = false;


}


else {


x2 = Evn.getx ();


y2 = evn.gety ();


int maxX = Math.max (X1,X2);


int maxy = Math.max (y1,y2);


int minX = Math.min (X1,X2);


int miny = Math.min (y1,y2);


recx = MinX;


recy = miny;


RECW = Maxx-minx;


RecH = Maxy-miny;


Labfullscreenimage.drawrectangle (Recx,recy,recw,rech);


}


}


public void mousemoved (MouseEvent e) {


Labfullscreenimage.drawcross (E.getx (), e.gety ());


}


});


Cp.add (borderlayout.center,labfullscreenimage);


dialog.setcursor (Cursor.getpredefinedcursor (cursor.crosshair_cursor));


Dialog.setalwaysontop (TRUE);


Dialog.setmaximumsize (


Toolkit.getdefaulttoolkit (). Getscreensize ());


dialog.setundecorated (TRUE);


dialog.setsize (Dialog.getmaximumsize ());


Dialog.setmodal (TRUE);


}


//singleton Pattern


public static Screencapture getinstance () {


return defaultcapturer;


}


/** Capture Full Screen mu * * *


public Icon Capturefullscreen () {


Fullscreenimage = Robot.createscreencapture (New Rectangle (


Toolkit.getdefaulttoolkit (). Getscreensize ()));


ImageIcon icon = new ImageIcon (fullscreenimage);


return icon;


}


/** an orthopedic area that captures the screen


*/


public void Captureimage () {


fullscreenimage = robot.createscreencapture (New Rectangle (


Toolkit.getdefaulttoolkit (). Getscreensize ()));


ImageIcon icon = new ImageIcon (fullscreenimage);


Labfullscreenimage.seticon (icon);


dialog.setvisible (TRUE);


}


/** gets captured bufferedimage*/


public BufferedImage Getpickedimage () {


return pickedimage;


}


/** gets captured icon*/


public ImageIcon Getpickedicon () {


return new ImageIcon (Getpickedimage ());


}


/** is stored as a file in PNG format


* @deprecated


*replaced by saveaspng (file file)


**/


@Deprecated


public void SaveToFile (file file) throws ioexception{


Imageio.write (Getpickedimage (), defaultimageformater,file);


}


/** is stored as a file, in PNG format * *


public void saveaspng (file file) throws IOException {


Imageio.write (Getpickedimage (), "PNG", file);


}


/** stored as a JPEG format image file * *


public void saveasjpeg (file file) throws IOException {


Imageio.write (Getpickedimage (), "JPEG", file);


}