In depth Java Robot implementation of the mouse and keyboard control method

The java.awt. Robot class is used to control the mouse and keyboard. Once you have this control, you can do any type of operation with the mouse and keyboard through your Java code. This class is often used to automate tests. The following code sample will show you how the Robot class handles keyboard events. If you run this code and open notepad, you will see HI CAOER in notepad. Try it out.

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;
public class RobotExp {
public static void main(String[] args) {
try {
Robot robot = new Robot();
//Define a 5 second delay so you can open notepad
//Robot began to write
robot.delay(5000);
robot.keyPress(KeyEvent.VK_H);
robot.keyPress(KeyEvent.VK_I);
robot.keyPress(KeyEvent.VK_SPACE);
robot.keyPress(KeyEvent.VK_C);
robot.keyPress(KeyEvent.VK_A);
robot.keyPress(KeyEvent.VK_O);
robot.keyPress(KeyEvent.VK_E);
robot.keyPress(KeyEvent.VK_R);
} catch (AWTException e) {
e.printStackTrace();
}
}
} 

Netizens improved the above code:

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;
import java.io.IOException;
public class RobotExp {
public static void pressKey(Robot robot, int keyvalue) {
robot.keyPress(keyvalue);
robot.keyRelease(keyvalue);
}
public static void pressKeyWithShift(Robot robot, int keyvalue) {
robot.keyPress(KeyEvent.VK_SHIFT);
robot.keyPress(keyvalue);
robot.keyRelease(keyvalue);
robot.keyRelease(KeyEvent.VK_SHIFT);
}
public static void closeApplication(Robot robot) {
// pressKey(robot, KeyEvent.VK_ALT);
// pressKey(robot, KeyEvent.VK_F4);
robot.keyPress(KeyEvent.VK_ALT);
robot.keyPress(KeyEvent.VK_F4);
robot.keyRelease(KeyEvent.VK_ALT);
robot.keyRelease(KeyEvent.VK_F4);
//for linux.
// robot.keyPress(KeyEvent.VK_ALT);
// robot.keyPress(KeyEvent.VK_W);
// robot.keyRelease(KeyEvent.VK_ALT);
// robot.keyRelease(KeyEvent.VK_W);
robot.keyPress(KeyEvent.VK_N);
robot.keyRelease(KeyEvent.VK_N);
}
public static void main(String[] args) throws IOException {
try {
Robot robot = new Robot();
Runtime.getRuntime().exec("notepad");
// For linux.
//Runtime.getRuntime().exec("gedit");
//Define a 5 second delay so you can open notepad haha
//Robot began to write
robot.delay(3000);
for (int i = 0; i < 100; i++) {
pressKeyWithShift(robot, KeyEvent.VK_H);
pressKey(robot, KeyEvent.VK_I);
pressKey(robot, KeyEvent.VK_SPACE);
//pressKeyWithShift(robot, KeyEvent.VK_H);
pressKeyWithShift(robot, KeyEvent.VK_I);
pressKey(robot, KeyEvent.VK_SPACE);
pressKey(robot, KeyEvent.VK_A);
pressKey(robot, KeyEvent.VK_M);
pressKey(robot, KeyEvent.VK_SPACE);
pressKey(robot, KeyEvent.VK_T);
pressKey(robot, KeyEvent.VK_H);
pressKey(robot, KeyEvent.VK_E);
pressKey(robot, KeyEvent.VK_SPACE);
pressKey(robot, KeyEvent.VK_J);
pressKey(robot, KeyEvent.VK_A);
pressKey(robot, KeyEvent.VK_V);
pressKey(robot, KeyEvent.VK_A);
pressKey(robot, KeyEvent.VK_SPACE);
pressKey(robot, KeyEvent.VK_R);
pressKey(robot, KeyEvent.VK_O);
pressKey(robot, KeyEvent.VK_B);
pressKey(robot, KeyEvent.VK_O);
pressKey(robot, KeyEvent.VK_T);
// VK_ENTER
pressKey(robot, KeyEvent.VK_ENTER);
//pressKey(robot, KeyEvent.);
}
closeApplication(robot);
//robot.keyPress(KeyEvent.VK_SPACE);
} catch (AWTException e) {
e.printStackTrace();
}
}
}