How can I move the mouse?

Question

Java

I have a laravel project on my server (amazon ec2)
and this java code

import java.awt.event.MouseEvent;
import java.awt.*;

public class Run {

    private static Robot robot = null;

    public static void main(String[] args)
    {
        System.out.println("Hi");
        try{
            robot = new Robot();
        }catch (AWTException e){
            e.printStackTrace();
        }

        klick(250,410);
    }

    public static void klick(int x, int y)
    {
        robot.mouseMove(x,y);       
    }

}

one of the page should run this code and move the mouse but when run it gives this error

Hi
java.awt.AWTException: headless environment
  at java.awt.Robot.<init>(Robot.java:91)
  at Run.main(Run.java:15)
Exception in thread "main" java.lang.NullPointerException
  at Run.klick(Run.java:25)
  at Run.main(Run.java:20)

But at the same time, this code also produces Hi
System.out.println("Hi");

Answer 1

Well, to top it all off, you have a robot = null variable, which is what is written in the stacktrace. Those. the fall occurs in the click method, when the mouseMove method is called on the robot variable.