Java中Iterator的使用

import java.util.ArrayList;import java.util.Iterator;import java.util.List;/** * Created by cuboo on 2016/9/28. */public class iterator {    public static void main(String agrs[]){        List<String> list = new ArrayList<String>();        list.add("A");        list.add("B");        list.add("C");        list.add("A");        for (String s: list) {            System.out.println("ArrayList:"+s);        }        Iterator<String> iterator =  list.iterator();        while (iterator.hasNext()){            System.out.println(iterator.next());        }    }}