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 }
