I want to implement Key Listener on jlabel

Question

I have added JLabel on my JFrame object. I want to implement a key listener on JLabel. Can I implement it? If yes, how can I do that?

Answer 1

You might not want to add a KeyListener on a JLabel. It would be better if you would add it to the JFrame.
Supposing you have the following code structure, then it should work:

public class MyFrame extends JFrame {
    private JLabel jLab;
    //...fields, getters, setters whatever...
    private int i;
    public MyFrame()
    {
        i = 0;
        jLab = new JLabel("Example");
        addKeyListener(new KeyListener() {
            @Override
            public void keyPressed(KeyEvent ke) {
                //doSomething(); - this may create confusion.
            }
            @Override
            public void keyReleased(KeyEvent ke) {
                //doSomething(); - this may create confusion.
            }
            @Override
            public void keyTyped(KeyEvent ke) {
                doSomething();
            }
        });
        add(jLab);
        pack();
        setVisible(true);
    }

    private void doSomething() {
        i++;
        jLab.setText(i + "");
    }
}

And, don't forget to import!

import javax.swing.*;
import java.awt.event.*;

---

RESULT: when you create a new MyFrame in the main() method. This is what you see at first:

After five random key-strokes,

Answer 2

Guess I'm a bit too late but calling label.requestFocus(); after adding the key listener to the label works for me!

Answer 3

Key events are fired by the component with the keyboard focus when the user presses or releases keyboard keys.

BUT JLabel is not one of those components.