Control your keyboard with Java

Control your keyboard with Java

You may control your keyboard using this simple program.Please dont run this program directly, its just for reference

import java.awt.Robot; 

import java.awt.event.InputEvent; 

import java.awt.event.KeyEvent; 

/* 

 * To change this template, choose Tools | Templates 

 * and open the template in the editor. 

 */ 

/** 

 * 

 * @author Anurag 

 */ 

public class ControlKeyboard { 

    public static void main(String args[]) { 

        new ControlKeyboard().control_keyboard(); 

    } 

    public void control_keyboard() { 

        try { 

            Robot robot = new Robot(); 

            //Perform ALT+TAB which will switch your window 

            robot.keyPress(KeyEvent.VK_ALT); 

            robot.keyPress(KeyEvent.VK_TAB); 

            Thread.sleep(100); 

            robot.keyRelease(KeyEvent.VK_ALT); 

            robot.keyRelease(KeyEvent.VK_TAB); 

            //Press Key A 

            robot.keyPress(KeyEvent.VK_A); 

            Thread.sleep(100); 

            robot.keyRelease(KeyEvent.VK_A); 

            //Similarly to press key Z use  

            robot.keyPress(KeyEvent.VK_Z); 

            Thread.sleep(100); 

            robot.keyRelease(KeyEvent.VK_Z); 

            //Press ALT key 

            robot.keyPress(KeyEvent.VK_ALT); 

            Thread.sleep(100); 

            robot.keyRelease(KeyEvent.VK_ALT); 

            //Press Control Key 

            robot.keyPress(KeyEvent.VK_CONTROL); 

            Thread.sleep(100); 

            robot.keyRelease(KeyEvent.VK_CONTROL); 

        } catch (Exception e) { 

            e.printStackTrace(); 

        } 

    } 

} 

Explaination :

First we make an object of Robot class.

If we want to press a keyboard key then we use the keyPress and keyRelease method.

Always make sure there is a delay of some small seconds before key press and key release events

Suppose if we want to click A then we use KeyEvent.VK_A, for B we use VK_B ...., for Z VK_Z.

To perform Control key use VK_CONTROL, ALT key we use VK_ALT and likewise there are other combinations.

To perform multiple key event we perform the key press for both keys and after that give a small delay. After that we perform the release operation.

For eg: In above example we perform keypress for both VK_ALT and VK_TAB together. Then we give small delay and then perform the keyrelease for VK_ALT and VK_TAB together