java：super修饰构造器

//public class是正主
public class Person {
    int age;
    String  name;
    //空构造器
    public Person() {
    }
    public Person(int age, String name) {
        this.age = age;
        this.name = name;
    }
}
 class Student extends Person{
    int score;
    //空构造器
    public Student() {
        super();//实际上每个构造器里都有一个这
    }

    public Student(int score) {
        this.score = score;
    }

    public Student(int age, String name, int score) {
//        this.age=age;//这个也可以
//        this.name=name;

//        super.age=age;//最传统最便于理解的方法
//        super.name=name;
        //super();  //super调用构造器只能调一次
        //因为age和name是父类中的方法，所以需要用super来代表父类
        super(age, name);//利用super调用父类构造器
        this.score = score;
    }
}
 class Test {
    public static void main(String[] args) {
        Student s1=new Student(12);
        Student s2=new Student(18,"lxl",100);
    }
}