集合遍历 Iterator Foreach

Iterator<T> iterator()返回一个在一组 T 类型的元素上进行迭代的迭代器

---

Foreach遍历

public static void main(String[] args) {        Student s1 = new Student("bob", false);        Student s2 = new Student("李四", true);        ArrayList<Student> arrayList = new ArrayList<Student>();        arrayList.add(s1);        arrayList.add(s2);        for (Student s:arrayList){            System.out.println("姓名："+ s.name+" " +"性别：" + s.sex);        }姓名：bob 性别：false姓名：李四 性别：true