CODEWITHSUNDEEP
javaswingkeyboard-eventskey-bindingsbackspace
Steve Cohen
Steve Cohen

Reputation: 4859

Can't map Control-Backspace to a KeyStroke

I am having trouble mapping the Control-Backspace key to a KeyStroke. The following makes no sense to me.

import java.awt.event.KeyEvent;
import javax.swing.KeyStroke;
public class TestControlBackspace {
    public static void main(String[] args) {
        KeyStroke ks1 = KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SPACE, KeyEvent.VK_CONTROL);
        KeyStroke ks2 = KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SPACE, KeyEvent.VK_SHIFT);
        KeyStroke ks3 = KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SPACE, 0);
        System.out.println(ks1);
        System.out.println(ks2);
        System.out.println(ks3);
    }
}

Output:

shift pressed BACK_SPACE

pressed BACK_SPACE

pressed BACK_SPACE

Am I missing something here?

Upvotes: 3

Views: 1509

Answers (1)

Atreys
Atreys

Reputation: 3761

You probably forgot to read the documentation. Note that the modifier masks come from a different location than the key pressed.

import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.KeyStroke;
public class TestControlBackspace {
    public static void main(String[] args) {
        KeyStroke ks1 = KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SPACE, InputEvent.SHIFT_DOWN_MASK);
        KeyStroke ks2 = KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SPACE, InputEvent.CTRL_DOWN_MASK);
        KeyStroke ks3 = KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SPACE, 0);
        System.out.println(ks1);
        System.out.println(ks2);
        System.out.println(ks3);
    }
}

Upvotes: 7

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