在Java中检测并操作键盘方向键

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class KeyboardDemo extends JFrame implements KeyListener {
    private JTextField textField;

    public KeyboardDemo() {
        textField = new JTextField(20);
        textField.addKeyListener(this);
        add(textField);
        setTitle("Keyboard Demo");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();
        if (keyCode == KeyEvent.VK_UP) {
            textField.setText("Up arrow key pressed");
        } else if (keyCode == KeyEvent.VK_DOWN) {
            textField.setText("Down arrow key pressed");
        } else if (keyCode == KeyEvent.VK_LEFT) {
            textField.setText("Left arrow key pressed");
        } else if (keyCode == KeyEvent.VK_RIGHT) {
            textField.setText("Right arrow key pressed");
        }
    }

    public void keyReleased(KeyEvent e) {
    }

    public void keyTyped(KeyEvent e) {
    }

    public static void main(String[] args) {
        new KeyboardDemo();
    }
}