KeyAdapter listener works in Windows, not on Mac

Question

I created a simple Nibbles (Snakes) game and everything works perfectly.

However, when I copy everything over to my mac (develop on a PC) and compile the same java files, the keyAdapter event listener for moving my snake around doesn't respond.

I'm not sure what is wrong.

here's the snippet, but if anyone would be willing to take a look at the whole program, I could send that privately. THANKS!

getThis().addKeyListener(new KeyAdapter()  {
        public void keyPressed(KeyEvent event) {                    
            if(event.getKeyCode() == KeyEvent.VK_UP)
                if(!glass.game.getDirection().equals("D"))
                    glass.game.setDirection("U");

            if(event.getKeyCode() == KeyEvent.VK_DOWN)
                if(!glass.game.getDirection().equals("U"))
                    glass.game.setDirection("D");

            if(event.getKeyCode() == KeyEvent.VK_LEFT)
                if(!glass.game.getDirection().equals("R"))
                    glass.game.setDirection("L");

            if(event.getKeyCode() == KeyEvent.VK_RIGHT)
                if(!glass.game.getDirection().equals("L"))
                    glass.game.setDirection("R");
          }
});

"To fire keyboard events, a component must have the keyboard focus."—[*How to Write a Key Listener*](http://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html). — trashgod, Apr 02 '12 at 08:58

score 6 · Answer 1 · edited May 23 '17 at 12:24

6

use KeyBindings instead of KeyListener, KeyListener isn't designated for listening KeyEvents in the Swing JComponents, this's listener for AWT Components, example here

edited May 23 '17 at 12:24

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answered Apr 02 '12 at 08:42

mKorbel

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KeyAdapter listener works in Windows, not on Mac

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