java-面向对象 编写教师类

题目要求

这里只写一个子类,教授类

现在新建3个类 -----app测试类-----teacher教师类(父类)------professor教授类(子类)

先写教师类

package com.practice.Keshan;

public class Teacher {
    private String name;  //姓名
    private int age;  //年龄
    private String post;  //职称
    private double salary;  //基本工资
    private double grade; //工资级别

    //有参构造器
    public Teacher(String name, int age, String post, double salary, double grade) {
        this.name = name;
        this.age = age;
        this.post = post;
        this.salary = salary;
        this.grade = grade;
    }

    //写set 和 get 方法

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getPost() {
        return post;
    }

    public void setPost(String post) {
        this.post = post;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }

    public double getGrade() {
        return grade;
    }

    public void setGrade(double grade) {
        this.grade = grade;
    }

    //写一个方法,返回属性信息
    public String  introduce(){
        System.out.println("基本信息");
        return "姓名:"+name+"t"+"年龄:" +age+"t"+"职称:"+post+"t"+"基本工资:"+salary+"t"+"工资级别:"+grade;
    }
}

然后写子类

package com.practice.Keshan;


//教授类-=------------------ 教师类子类
public class Professor extends Teacher {//这里报错的原因是调用不到父类的无参构造,所以子类需要重写父类的有参构造
    public Professor(String name, int age, String post, double salary, double grade) {
        super(name, age, post, salary, grade);
    }


    //按照题目要求子类要重写父类的返回方法
    //且重写了之后他也可以调用父类的introduce
  
    @Override
    public String introduce() {
        System.out.println("我是教授类");
        return super.introduce();
    }
}

然后测试类----开始运行

package com.practice.Keshan;

public class app {
    public static void main(String[] args) {
        Teacher teacher = new Teacher("LYZ", 23, "教授", 899999, 1.3);
        System.out.println(teacher.introduce());  //这里输出的是Teacher类的
        System.out.println("=============================我是分割线====================================");
        Professor professor = new Professor("LYZ", 23, "教授", 899999, 1.3);
        //因为重写了父类的introduce,所以他也能用
        System.out.println(professor.introduce());  //这里是输出子类的
    }
}

运行结果