Using java.awt.Robot class

The java.awt.Robot class is used to generate native system input events for the purposes of test automation, self-running demos, and other applications where control of the mouse and keyboard is needed. The primary purpose of Robot is to facilitate automated testing of Java platform implementations.

This tester program tests the important methods of this class.

Source:

import java.awt.AWTException; 
import java.awt.Robot; 
import java.awt.event.InputEvent;

public class JRobot {
    Robot robot;
    public JRobot() throws AWTException{ 
        robot = new Robot();
        System.out.println(robot);
    } 
    
    public void type(String s){ 
        byte[] bytes = s.getBytes();

        for(byte b:bytes){
            if(b>96 && b<123) b-=32;
            robot.keyPress(b);
            robot.delay(200);
            robot.keyRelease(b);
        }
    }
    
    //Performing a right click
    public void rightClick(int x, int y){
        robot.mouseMove(x, y);
        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
    }
  
    //Random cursor movement
    public void testMouseMovement(){
        for(int i=0;i<200;++i){
            robot.mouseMove(i, 200); 
            robot.delay(5);
        }
    }
    
    //Scrolling down
    public void scrollDown(int amount){
        for(int i=0;i<amount;++i){
            robot.mouseWheel(i);
            robot.delay(500);
        }
    }
    
    //Getting pixel colors
    public void printColors(int x, int y){
        for(int i=0;i<200;++i,++x,++y){
            robot.mouseMove(x, y);
            System.out.print("\nPixel at "+x+", "+y+" has color ");
            System.out.print(robot.getPixelColor(x, y));
        }
    }
    
    public static void main(String[] args) throws AWTException{
        JRobot r = new JRobot();
        /*
          Delay before performing every action
          Can be added manually too (using robot.delay(int ms))
        */
        r.robot.setAutoDelay(5); 
        r.testMouseMovement();
        r.rightClick(200, 500);
        r.type("And the secret is... yet to be revealed");
        r.rightClick(590, 500);
        r.scrollDown(5); 
        r.printColors(0, 0);
    }
}