java 持有对象 ListIterator用法

package ch07;

import java.io.*;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.ListIterator;

public class Read {
    public static void main(String[] args)throws IOException
    {
        BufferedReader in = new BufferedReader(new FileReader("src/io/Alien.java"));
        LinkedList<String> list = new LinkedList<String>();
        String s;
        StringBuilder sd = new StringBuilder();
        while(in.ready())
        {
            s=in.readLine();
            list.add(s);
        }
        ListIterator<String> it = list.listIterator(list.size());
        while(it.hasPrevious())
            System.out.println(it.previous());
    }
}