花几分钟帮忙看上JList有关问题。_J2SE

花几分钟帮忙看下JList问题。。
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
import static java.awt.BorderLayout.*;

public class List {
JFrame f=new JFrame();

DefaultListModel model1 = new DefaultListModel();
DefaultListModel model2 = new DefaultListModel();

JList l=new JList(model1);
JList r=new JList(model2);
JPanel p=new JPanel();
JButton zuo=new JButton("<<");
JButton you=new JButton(">>");

public void init()
{
model1.addElement("选项1");
model1.addElement("选项3");
model2.addElement("选项2");
you.addActionListener(new B());

f.setLayout(new BorderLayout());
f.add(l,WEST);
f.add(r,EAST);
f.add(p,CENTER);
p.setLayout(new BorderLayout());
p.add(you,SOUTH);
p.add(zuo,NORTH);

f.pack();
f.setSize(500,300);
f.setVisible(true);

}

class B implements ActionListener{
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==you)

{
model1.removeElement(l.getSelectedIndex());

}
}
}
public static void main(String[] args)
{
new List().init();

}
}

我点击按钮“>>” 为什么l列表里面的选项不会删除掉？

------解决方案--------------------------------------------------------
删除函数调用错了吧、、

Java code

import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;import static java.awt.BorderLayout.*;public class Tet2 {    JFrame f = new JFrame();    DefaultListModel model1 = new DefaultListModel();    DefaultListModel model2 = new DefaultListModel();    JList l = new JList(model1);    JList r = new JList(model2);    JPanel p = new JPanel();    JButton zuo = new JButton("<<");    JButton you = new JButton(">>");    public void init()    {        model1.addElement("选项1");        model1.addElement("选项3");        model2.addElement("选项2");        you.addActionListener(new B());        f.setLayout(new BorderLayout());        f.add(l, WEST);        f.add(r, EAST);        f.add(p, CENTER);        p.setLayout(new BorderLayout());        p.add(you, SOUTH);        p.add(zuo, NORTH);        f.pack();        f.setSize(500, 300);        f.setVisible(true);    }    class B implements ActionListener    {        public void actionPerformed(ActionEvent e)        {            if (e.getSource() == you)            {//                model1.clear();                System.out.println(l.getSelectedIndex());                model1.[color=#FF0000]removeElementAt[/color](l.getSelectedIndex());            }        }    }    public static void main(String[] args)    {        new Tet2().init();    }}
------解决方案--------------------------------------------------------
应该用removeElementAt，他接受index。你写的应该传对象。