Is there a way to take a screenshot using Java and save it to some sort of image

Question

Simple as the title states  Can you use only Java commands to take a screenshot and save it   Or  do I need to use an OS specific program to take the screenshot and then grab it off the clipboard

User · Answer

If you d like to capture all monitors  you can use the following code   GraphicsEnvironment ge   GraphicsEnvironment getLocalGraphicsEnvironment    GraphicsDevice   screens   ge getScreenDevices     Rectangle allScreenBounds   new Rectangle    for  GraphicsDevice screen   screens        Rectangle screenBounds   screen getDefaultConfiguration   getBounds         allScreenBounds width    screenBounds width      allScreenBounds height   Math max allScreenBounds height  screenBounds height      Robot robot   new Robot    BufferedImage screenShot   robot createScreenCapture allScreenBounds

User · Answer

I never liked using Robot  so I made my own simple method for making screenshots of JFrame objects   public static final void makeScreenshot JFrame argFrame        Rectangle rec   argFrame getBounds        BufferedImage bufferedImage   new BufferedImage rec width  rec height  BufferedImage TYPE INT ARGB       argFrame paint bufferedImage getGraphics          try              Create temp file         File temp   File createTempFile  screenshot     png                Use the ImageIO API to write the bufferedImage to a temporary file         ImageIO write bufferedImage   png   temp               Delete temp file when program exits         temp deleteOnExit          catch  IOException ioe            ioe printStackTrace

User · Answer

GraphicsEnvironment ge   GraphicsEnvironment getLocalGraphicsEnvironment      GraphicsDevice   screens   ge getScreenDevices           Rectangle allScreenBounds   new Rectangle      for  GraphicsDevice screen   screens             Rectangle screenBounds   screen getDefaultConfiguration   getBounds                   allScreenBounds width    screenBounds width           allScreenBounds height   Math max allScreenBounds height  screenBounds height          allScreenBounds x Math min allScreenBounds x  screenBounds x          allScreenBounds y Math min allScreenBounds y  screenBounds y            Robot robot   new Robot    BufferedImage bufferedImage   robot createScreenCapture allScreenBounds   File file   new File  C   Users  Joe  Desktop  scr png    if  file exists        file createNewFile    FileOutputStream fos   new FileOutputStream file   ImageIO write  bufferedImage   png   fos      bufferedImage will contain a full screenshot  this was tested with three monitors

User · Answer

Toolkit returns pixels based on PPI  as a result  a screenshot is not created for the entire screen when using PPI  100  in Windows  I propose to do this   DisplayMode displayMode   GraphicsEnvironment getLocalGraphicsEnvironment   getScreenDevices   0  getDisplayMode    Rectangle screenRectangle   new Rectangle displayMode getWidth    displayMode getHeight     BufferedImage screenShot   new Robot   createScreenCapture screenRectangle

User · Answer

public void captureScreen String fileName  throws Exception      Dimension screenSize   Toolkit getDefaultToolkit   getScreenSize       Rectangle screenRectangle   new Rectangle screenSize      Robot robot   new Robot       BufferedImage image   robot createScreenCapture screenRectangle      ImageIO write image   png   new File fileName

User · Answer

Believe it or not  you can actually use java awt Robot to  create an image containing pixels read from the screen   You can then write that image to a file on disk   I just tried it  and the whole thing ends up like   Rectangle screenRect   new Rectangle Toolkit getDefaultToolkit   getScreenSize     BufferedImage capture   new Robot   createScreenCapture screenRect   ImageIO write capture   bmp   new File args 0       NOTE  This will only capture the primary monitor  See GraphicsConfiguration for multi-monitor support

User · Answer

You can use java awt Robot to achieve this task   below is the code of server  which saves the captured screenshot as image in your Directory   import java awt image BufferedImage  import java io File  import java io IOException  import java net ServerSocket  import java net Socket  import java net SocketTimeoutException  import java sql SQLException  import java text DateFormat  import java text SimpleDateFormat  import java util Date   import javax imageio ImageIO   public class ServerApp extends Thread          private ServerSocket serverSocket null         private static Socket server   null         private Date date   null         private static final String DIR NAME    screenshots       public ServerApp   throws IOException  ClassNotFoundException  Exception         serverSocket   new ServerSocket 61000          serverSocket setSoTimeout 180000         public void run               while true                     try                            server   serverSocket accept                  date   new Date                      DateFormat dateFormat   new SimpleDateFormat   yyMMdd HHmmss                  String fileName   server getInetAddress   getHostName   replace       -                  System out println fileName                 BufferedImage img ImageIO read ImageIO createImageInputStream server getInputStream                    ImageIO write img   png   new File  D   screenshots    fileName dateFormat format date    png                   System out println  Image received                        lblimg setIcon img                        catch SocketTimeoutException st                            System out println  Socket timed out   st toString        createLogFile   stocktimeoutexception   stExp getMessage                       break                              catch IOException e                                   e printStackTrace                      break                      catch Exception ex                          System out println ex                              public static void main String    args  throws IOException  SQLException  ClassNotFoundException  Exception            ServerApp serverApp   new ServerApp              serverApp createDirectory DIR NAME             Thread thread   new Thread serverApp               thread start          private void createDirectory String dirName        File newDir   new File  D     dirName       if  newDir exists             boolean isCreated   newDir mkdir                  And this is Client code which is running on thread and after some minutes it is capturing the screenshot of user screen   package com viremp client   import java awt AWTException  import java awt Dimension  import java awt Rectangle  import java awt Robot  import java awt Toolkit  import java awt image BufferedImage  import java io IOException  import java net Socket  import java util Random   import javax imageio ImageIO   public class ClientApp implements Runnable       private static long nextTime   0      private static ClientApp clientApp   null      private String serverName    192 168 100 18     loop back ip     private int portNo   61000        private Socket serverSocket   null                   param args         throws InterruptedException              public static void main String   args  throws InterruptedException           clientApp   new ClientApp            clientApp getNextFreq            Thread thread   new Thread clientApp           thread start               private void getNextFreq             long currentTime   System currentTimeMillis            Random random   new Random            long value   random nextInt 180000     1800000         nextTime   currentTime   value            return currentTime value              Override     public void run             while true               if nextTime  lt  System currentTimeMillis                     System out println   get screen shot                     try                       clientApp sendScreen                        clientApp getNextFreq                      catch  AWTException e                           TODO Auto-generated catch block                     System out println   err  e                     catch  IOException e                           TODO Auto-generated catch block                     e printStackTrace                      catch Exception e                       e printStackTrace                                                   System out println   statrted                               private void sendScreen  throws AWTException  IOException              Socket serverSocket   new Socket serverName  portNo                Toolkit toolkit   Toolkit getDefaultToolkit                 Dimension dimensions   toolkit getScreenSize                     Robot robot   new Robot        Robot class                   BufferedImage screenshot   robot createScreenCapture new Rectangle dimensions                     ImageIO write screenshot  png  serverSocket getOutputStream                      serverSocket close

User · Answer

import java awt Color  import java awt Dimension  import java awt Rectangle  import java awt Robot  import java awt Toolkit  import java awt event ActionEvent  import java awt event ActionListener  import java awt image BufferedImage  import java io File   import javax imageio ImageIO  import javax swing       public class HelloWorldFrame extends JFrame implements ActionListener    JButton b  public HelloWorldFrame         this setVisible true       this setLayout null       b   new JButton  Click Here        b setBounds 380  290  120  60       b setBackground Color red       b setVisible true       b addActionListener this       add b       setSize 1000  700     public void actionPerformed ActionEvent e        if  e getSource      b                 this dispose            try               Thread sleep 1000               Toolkit tk   Toolkit getDefaultToolkit                 Dimension d   tk getScreenSize                Rectangle rec   new Rectangle 0  0  d width  d height                 Robot ro   new Robot                BufferedImage img   ro createScreenCapture rec               File f   new File  myimage jpg     set appropriate path             ImageIO write img   jpg   f             catch  Exception ex                System out println ex getMessage                        public static void main String   args        HelloWorldFrame obj   new HelloWorldFrame

[java] Is there a way to take a screenshot using Java and save it to some sort of image?

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