package com.test; import java.util.ArrayList; import java.util.Iterator; import java.util.List; public class ArrayListDemo { public static void main(String args[]){    List list = new ArrayList();    list.add("luojiahui");    list.add("luojiafeng");    //方法1    Iterator it1 = list.iterator();    while(it1.hasNext()){    System.out.println(it1.next());    }    //方法2    for(Iterator it2 = list.iterator();it2.hasNext();){    System.out.println(it2.next());    }    //方法3    for(String tmp:list){    System.out.println(tmp);    }    //方法4    for(int i = 0;i < list.size(); i ++){    System.out.println(list.get(i));    }   } }