내 KeyListener가 내 JPanel에서 작동하지 않는 이유는 무엇입니까?

<code class="java">import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JPanel;
import javax.swing.KeyStroke;

public class GamePanel extends JPanel implements ActionListener, KeyListener {
    // Initialize keybindings
    private void setupKeyBindings() {
        // Add a key binding for the left arrow key
        getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), "Left");
        // Add an action listener for the "Left" action
        getActionMap().put("Left", new leftAction());
    }
    
    // Implementation details for the leftAction class...
    
    @Override
    public void keyTyped(KeyEvent e) {}

    @Override
    public void keyPressed(KeyEvent e) {}

    @Override
    public void keyReleased(KeyEvent e) {}

    @Override
    public void actionPerformed(ActionEvent e) {
        // Perform additional game actions based on the event
    }
}</code>