如何在KeyListener Java中每隔100毫秒更新一次画布

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

public class MyCanvas extends JPanel {
    private Timer timer;

    public MyCanvas() {
        timer = new Timer(100, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                repaint(); // 触发画布的重绘
            }
        });
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        // 在这里绘制画布的内容
        // ...
    }

    public void startTimer() {
        timer.start();
    }

    public void stopTimer() {
        timer.stop();
    }
}

public class KeyListenerExample implements KeyListener {
    private MyCanvas canvas;

    public KeyListenerExample(MyCanvas canvas) {
        this.canvas = canvas;
    }

    public void keyPressed(KeyEvent e) {
        if (!canvas.timer.isRunning()) {
            canvas.startTimer(); // 启动计时器，开始更新画布
        }
    }

    public void keyReleased(KeyEvent e) {
        canvas.stopTimer(); // 停止计时器，停止更新画布
    }

    public void keyTyped(KeyEvent e) {
        // 不需要实现
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("KeyListener Example");
        MyCanvas canvas = new MyCanvas();
        KeyListenerExample keyListener = new KeyListenerExample(canvas);

        canvas.setFocusable(true);
        canvas.addKeyListener(keyListener);

        frame.add(canvas);
        frame.setSize(400, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}