Java Tutorial/Development/Robot

Capture a screenshot

import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    Robot robot = new Robot();
    int x = 100;
    int y = 100;
    int width = 200;
    int height = 200;
    Rectangle area = new Rectangle(x, y, width, height);
    BufferedImage bufferedImage = robot.createScreenCapture(area);
    // Capture the whole screen
    area = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
    bufferedImage = robot.createScreenCapture(area);
  }
}

Capturing a Screen Shot

import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    Robot robot = new Robot();
    int x = 100;
    int y = 100;
    int width = 200;
    int height = 200;
    Rectangle area = new Rectangle(x, y, width, height);
    BufferedImage bufferedImage = robot.createScreenCapture(area);
    area = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
    bufferedImage = robot.createScreenCapture(area);
  }
}

Capturing Screen in an image using Robot class

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JWindow;
public class Main {
  public static void main(String[] arg) throws Exception {
    Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();
    Robot robot = new Robot();

    BufferedImage image = robot.createScreenCapture(new Rectangle(0, 0, (int) screenDim.getWidth(),
        (int) screenDim.getHeight()));
    JWindow window = new JWindow(new JFrame());
    window.getContentPane().setLayout(new BorderLayout());
    window.getContentPane().add(BorderLayout.CENTER, new JLabel(new ImageIcon(image)));
    window.pack();
    window.setVisible(true);
  }
}

Create key press event using Robot class?

import java.awt.Robot;
import java.awt.event.KeyEvent;
public class Main {
  public static void main(String[] args) throws Exception {
    Robot robot = new Robot();
    robot.delay(3000);
    robot.keyPress(KeyEvent.VK_Q);
    robot.keyPress(KeyEvent.VK_W);
    robot.keyPress(KeyEvent.VK_E);
    robot.keyPress(KeyEvent.VK_R);
    robot.keyPress(KeyEvent.VK_T);
    robot.keyPress(KeyEvent.VK_Y);
  }
}

Create mouse event using Robot class

import java.awt.Robot;
import java.awt.event.InputEvent;
public class Main {
  public static void main(String[] args) throws Exception {
    Robot robot = new Robot();
    robot.mouseMove(200, 200);
    robot.mousePress(InputEvent.BUTTON1_MASK);
    robot.mouseRelease(InputEvent.BUTTON1_MASK);
    robot.mouseWheel(-100);
  }
}

Get the colour of a screen pixel

import java.awt.Color;
import java.awt.Robot;
public class Main {
  public static void main(String[] args) throws Exception{
    Robot robot = new Robot();
    Color color = robot.getPixelColor(20, 20);
    System.out.println("Red   = " + color.getRed());
    System.out.println("Green = " + color.getGreen());
    System.out.println("Blue  = " + color.getBlue());
  }
}

Moving the Cursor on the Screen

import java.awt.Robot;
public class Main {
  public static void main(String[] argv) throws Exception {
    Robot robot = new Robot();
    robot.mouseMove(500, 500);
  }
}

Simulate a key press

import java.awt.Robot;
import java.awt.event.KeyEvent;
public class Main {
  public static void main(String[] argv) throws Exception {
    Robot robot = new Robot();
    robot.keyPress(KeyEvent.VK_A);
    robot.keyRelease(KeyEvent.VK_A);
  }
}

Simulate a mouse click

import java.awt.Robot;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
public class Main {
  public static void main(String[] argv) throws Exception {
    Robot robot = new Robot();
    
    robot.mousePress(InputEvent.BUTTON1_MASK);
    robot.mouseRelease(InputEvent.BUTTON1_MASK);
  }
}