9.Super详解

 1 package com.oop.demo05;
 2 
 3 //Java中，所有的类，都默认直接或者间接的继承Object类
 4 //Person 人
 5 public class Person {
 6 
 7     public Person() {
 8         System.out.println("Person无参构造执行了");
 9     }
10 
11     protected String name = "duanfu";
12 
13     public void print() {
14         System.out.println("Person");
15     }
16 }

 1 package com.oop.demo05;
 2 
 3 //学生 is 人：派生类，子类
 4 //子类继承了父类，就会拥有父类的全部方法
 5 public class Student extends Person {
 6 
 7     public Student() {
 8         //隐藏代码；默认调用了父类的无参构造
 9         super();//调用父类的构造器，必须要在子类构造器的第一行
10         System.out.println("Student无参构造执行了");
11     }
12 
13     private String name = "leiwei";
14 
15     public void print() {
16         System.out.println("Student");
17     }
18 
19     public void test1() {
20         print();//Student
21         this.print();//Student
22         super.print();//Person
23     }
24 
25     public void test(String name) {
26         System.out.println(name);//雷伟
27         System.out.println(this.name);//leiwei
28         System.out.println(super.name);//duanfu
29     }
30 
31 }

 1 package com.oop;
 2 
 3 import com.oop.demo05.Student;
 4 
 5 public class Application {
 6 
 7     public static void main(String[] args) {
 8 
 9         Student student = new Student();
10         //student.test("雷伟");
11         student.test1();
12     
13     }
14     
15 }