如何为JLabel创建快捷键？

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

public class ShortcutExample extends JFrame {
    public ShortcutExample() {
        setTitle("快捷键示例");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setLocationRelativeTo(null);

        JLabel label = new JLabel("按下Alt+K");
        label.setHorizontalAlignment(JLabel.CENTER);
        label.setFont(new Font("Arial", Font.PLAIN, 20));

        // 创建一个Action对象
        Action action = new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "你按下了Alt+K");
            }
        };

        // 将Action对象与KeyStroke关联
        KeyStroke keyStroke = KeyStroke.getKeyStroke("alt K");
        InputMap inputMap = label.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
        inputMap.put(keyStroke, "action");
        label.getActionMap().put("action", action);

        add(label);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            ShortcutExample example = new ShortcutExample();
            example.setVisible(true);
        });
    }
}