JavaSE-10.3.1【继承案例-老师和学生】 

 1 package day1.yppah03;
 2 
 3 /*
 4 3 继承练习
 5 
 6 3.1 案例-老师和学生
 7  */
 8 
 9 public class PersonDemo {
10     public static void main(String[] args) {
11         Teacher t1 = new Teacher();
12         t1.setName("tom");
13         t1.setAge(30);
14         System.out.println(t1.getName() + "," + t1.getAge());
15         t1.teach();
16 
17         Teacher t2 = new Teacher("amy", 28);
18         System.out.println(t2.getName() + "," + t2.getAge());
19         t2.teach();
20 
21         Student s1 = new Student();
22         s1.setName("zhangsan");
23         s1.setAge(16);
24         System.out.println(s1.getName() + "," + s1.getAge());
25         s1.study();
26 
27         Student s2 = new Student("lisi", 17);
28         System.out.println(s2.getName() + "," + s2.getAge());
29         s2.study();
30     }
31 }
 1 package day1.yppah03;
 2 
 3 public class Person {
 4 
 5     private String name;
 6     private int age;
 7 
 8     public Person() {
 9     }
10 
11     public Person(String name, int age) {
12         this.name = name;
13         this.age = age;
14     }
15 
16     public void setName(String name) {
17         this.name = name;
18     }
19 
20     public void setAge(int age) {
21         this.age = age;
22     }
23 
24     public String getName() {
25         return name;
26     }
27 
28     public int getAge() {
29         return age;
30     }
31 
32 }
 1 package day1.yppah03;
 2 
 3 public class Student extends Person{
 4 
 5     public Student() {
 6     }
 7 
 8     public Student(String name, int age) {
 9         super(name, age);
10     }
11 
12     public void study(){
13         System.out.println("好好学习");
14     }
15 
16 }
 1 package day1.yppah03;
 2 
 3 public class Teacher extends Person{
 4 
 5     public Teacher(){}
 6 
 7     public Teacher(String name, int age){
 8         /*this.name = name; //error 子类不可访问父类的私有成员
 9         this.age = age;*/
10         super(name, age); //利用父类有参构造实现子类的有参构造
11     }
12 
13     public void teach(){
14         System.out.println("好好教书");
15     }
16 
17 }

 

posted @ 2021-05-27 20:26  yub4by  阅读(4227)  评论(0)    收藏  举报