KeyboardListener.java

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class KeyboardListener extends KeyAdapter{

        public void KeyPressed(KeyEvent e){
            switch(e.getKeyCode()){
                case 39:
                        if(ThreadsController.directionSnake!=2)
                            ThreadsController.directionSnake=1;
                            break;
                case 38:
                        if(ThreadsController.directionSnake!=4)
                            ThreadsController.directionSnake=3;
                            break;
                case 37:
                        if(ThreadsController.directionSnake!=1)
                            ThreadsController.directionSnake=3;
                            break;
                case 40:
                        if(ThreadsController.directionSnake!=3)
                            ThreadsController.directionSnake=2;
                            break;
                default:    break;
            }
        }
    
}