java List 3种遍历方法

java List 3种遍历方法

1. for + .size()
2. for each
3. iterator迭代器
   for + .size()

for(int i=0;i<l1.size();i++){
			System.out.println(l1.get(i));
		}

for each

for(Object i:s1){
			System.out.println(i);
		}

iterator迭代器

while(iterator.hasNext()){
			Object c = iterator.next();
			System.out.println(c);
		}