遍历Arraylist的方法：

遍历Arraylist的几种方法：

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));
        }