【java迭代器遍历集合】

public void test(){
    Collection coll = new ArrayList();
    coll.add(123);
    coll.add(456);
    coll.add(new String("Tom"));
    coll.add(new Person("Jerry",21));
    coll.add(false);

    Iterator iterator = coll.iterator();
    while (iterator.hasNext()){
        System.out.println(iterator.next());

    }