- 转换成Iterator(java地带器,是一种访问集合的方式)
Collectioncollection = new ArrayList (); collection.add("123"); collection.add("456"); Iterator iterable = collection.iterator(); System.out.println(iterable.next());

Collectioncollection = new ArrayList (); collection.add("123"); collection.add("456"); Iterator iterable = collection.iterator(); System.out.println(iterable.next());