为什么不能使用MouseAdapter的mouseMoved（）获取光标位置？我想在移动鼠标并将其显示在终端中时得到它。

我该怎么做？

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;

public class FrameTest extends JFrame {
    public FrameTest() {
        addmouseListener(new MouseMovementListener());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocation(200,100);
        setSize(400,400);
        setVisible(true);
    }

    class MouseMovementListener extends MouseAdapter {
        public void mouseMoved(MouseEvent evt) {
            System.out.println("(" + evt.getX() + "," + evt.getY() + ")");
        }
    }

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