findComponentAt为JList返回自身

好的,所以我认为我的问题源于对JList是什么的根本缺乏理解 事实上 做。

我有一个简单的示例类 MyList .

package test;

import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Arrays;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;

public class MyList extends JList<String> {
    public MyList(Vector<String> myStrings){
        super(myStrings);
        this.setCellRenderer(new ListCellRenderer<String>(){
            @Override
            public Component getListCellRendererComponent(
                    JList<? extends String> list, String value, int index,
                    boolean isSelected, boolean cellHasFocus) {
                String myString = value.toString();
                return new JLabel(myString+" (idx "+index+")");
            }

        });

        this.addMouseListener(new MouseAdapter(){
            @Override
            public void mousePressed(MouseEvent e) {
                MyList p = (MyList) e.getSource();
                Component c = p.findComponentAt(e.getX(), e.getY());
                System.out.println("am clicking on "+c.getClass()+" in "+p.getClass());
            }
        });
    }

    public static void main(String[] args){
        Vector<String> myStrings = new Vector<String>();
        myStrings.addAll(Arrays.asList("str 1","str 2","str 3"));
        MyList mine = new MyList(myStrings);
        JFrame myFrame = new JFrame();
        myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myFrame.setSize(500, 500);
        myFrame.add(mine);
        myFrame.setVisible(true);
    }
}

单击任何 JLabel 列表中的内容相同:

am clicking on class test.MyList in class test.MyList

我希望是:

am clicking on class javax.swing.JLabel in class test.MyList

我认为这与ListCellRenderer的工作方式有关,但我不确定。为什么我不能从中恢复组件 p.findComponentAt(e.getX(), e.getY()); 一个JLabel?这是怎么回事?