java 遍历arrayList的四种方法

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));         }

    }

}