Useful Java Code Snippets 6 - A Screen Capture Program in Java



Looking for useful code examples to build your Java applications? 

A screenshot, screen capture (or screen-cap) is an image taken by a user to record the visible items displayed on the monitor, television, or other visual output device in use. 


Usually, this is a digital image using the operating system or software running on the computer, but it can also be a capture made by a camera or a device intercepting the video output of the display.


In this example we wrote an application that user can take the screenshot of his/her computer screen by simply pressing a button.


/**
* Author : Berk Soysal
* CaptureScreenshot.java
*/

package herrberk;

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.File;

public class CaptureScreenshot {
  
  public static void capture(String fileName) throws Exception  {
    
    try {
      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));
    } catch (Exception e) {
      System.out.println("Error: cannot capture");
    }   
    
  }
  
}




/**
* Author : Berk Soysal
* DrawButton.java
*/

package herrberk;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class DrawButton extends JFrame implements ActionListener {
  
  private JPanel panel = new JPanel();
  private JButton button = new JButton("Take A Snapshot !");
  
  public DrawButton(){
    
    panel.add(button);
    add(panel);
    panel.setBackground(Color.BLACK);
    setTitle("Berk's ScreenShot Program");
    button.addActionListener(this);
  }
  
  @Override
  public void actionPerformed(ActionEvent e) {
    Object source = e.getSource();
    if(source == button) {
      
      try {
        // You need to modify the image directory 
        CaptureScreenshot.capture("C:\\Users\\Herrberk\\Desktop\\Screenshot.png");
        System.out.println("Capture Successful !");
      } catch (Exception e1) {
        e1.printStackTrace();
      }
    }
    else System.out.println("Error in Button");
  }
  
  public static void main(String args[]) throws Exception{
    DrawButton db = new DrawButton();
    db.setVisible(true);
    db.setSize(260,80);
    db.setLocation(650, 300);
    
  }
  
}


If you do everything right the result should be like the figure below;




Please comment below if you have any questions. Thanks. 
 

Continue Reading Useful Java Code Snippets 7 - Animated GIF on JFrame

Author:

Software Developer, Codemio Admin


Disqus Comments Loading..