Traverse the elements in the collection through the iterator Iterable:
System.out.println("(迭代器)学生信息:");
Iterator it=students.iterator();
while(it.hasNext()){
Student s=(Student)it.next();
System.out.println("编号：" + s.ID + "\t\t\t姓名：" + s.name + "\t\t\t年龄:" + s.age + "\t\t\t性别:" + s.gender);
}The iterator is used to traverse the elements in the collection. It itself does not have storage capabilities and is dependent on Exists in collections.
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