java 遍曆arrayList的四種方法

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<String> list = new ArrayList<String>();        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));        }    }}