KeyListener不会更改变量

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

public class MyKeyListener implements KeyListener {
    private boolean isKeyPressed = false;

    @Override
    public void keyTyped(KeyEvent e) {
        // 当键盘上的键被敲击时触发，不涉及变量更改
    }

    @Override
    public void keyPressed(KeyEvent e) {
        // 当键盘上的键被按下时触发
        isKeyPressed = true;
        // 其他操作...
    }

    @Override
    public void keyReleased(KeyEvent e) {
        // 当键盘上的键被释放时触发
        isKeyPressed = false;
        // 其他操作...
    }

    public boolean isKeyPressed() {
        return isKeyPressed;
    }
}