CODEWITHSUNDEEP
javaswing
Sasha Prostotin
Sasha Prostotin

Reputation: 13

KeyEvent.getKeyCode() always returns zero

I am working on a pause key in my little school project, but for some reason it refuses to work. Using this code :

     public void keyTyped(KeyEvent me) { //ESCAPE PLS WORK ... 
        code = me.getKeyCode();
        System.out.println(code);
}

For some reason "code" always stays zero. I tried to put it in different voids(pressed/released etc), but it still does not work. What could be the reason?

Upvotes: 1

Views: 2968

Answers (2)

Stephen C
Stephen C

Reputation: 718758

Here's what the javadoc says about getKeyCode()

Returns: the integer code for an actual key on the keyboard. (For KEY_TYPED events, the keyCode is VK_UNDEFINED.)

And the value of VK_UNDEFINED is zero.

The javadoc also says:

public static final int KEY_TYPED

The "key typed" event. This event is generated when a character is entered. In the simplest case, it is produced by a single key press. Often, however, characters are produced by series of key presses, and the mapping from key pressed events to key typed events may be many-to-one or many-to-many.

So maybe you are looking at the wrong kind of key events. Maybe should be looking at the KEY_PRESSED or KEY_RELEASED events rather than the KEY_TYPED events.

Upvotes: 4

Young Emil
Young Emil

Reputation: 2266

Why not try the keyPressed() method again as in the example below:

public void keyPressed(KeyEvent e) {
    int code = e.getKeyCode();
    switch( code ) { 
        case KeyEvent.VK_UP:
            // handle up 
            System.out.println(code);
            break;
        case KeyEvent.VK_DOWN:
            // handle down 
            break;
        case KeyEvent.VK_LEFT:
            // handle left
            break;
        case KeyEvent.VK_RIGHT :
            // handle right
            break;
     }
}

Note that you must expect an integer.

Upvotes: 2

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