java代码如下，输出结果中为什么s对象？

Question

Collection    c2 =new ArrayList();
        Student s= new Student();
        c2.add(s);
        c2.add("我");
        Iterator it = c2.iterator();
        while (it.hasNext()) {
            it.next();
            Object object = (Object) it.next();
            System.out.println(object);
        }
输出结果为“我”，并没有s对象啊？

Answer 1

while (it.hasNext()) {
            it.next(); //第一个对象 Student 
            Object object = (Object) it.next(); //第二个对象 String 
            System.out.println(object);
}

Next is executed twice once in the while loop

Answer 2

A class that does not define the str method cannot println what you want.

Answer 3

it.next() loops twice

Answer 4

it.next() loops twice!