在班级中上课时，老师在讲台上讲课，偶有提问，会点名学生回答问题。虽然老师和学生都在讲话，但讲话的具体内容却不相同。本案例要求使用抽象类的知识编写一个程序实现老师上课的情景。

此案例分为四个类Person Student Teacher Test类

Person类

public abstract class Person {
    private String name;
    private int age;

    public Person() {
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    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 abstract void say();
}

Student类

public class Student extends Person{
    public Student (){

    }
    public Student(String name,int age){
        super(name,age);
    }
    @Override
    public void say() {
        System.out.println("学生姓名"+getName()+",年龄"+getAge()+".学生负责回答问题");
    }
}

Teacher类

public class Teacher extends Person{
    public Teacher(){

    }
    public Teacher(String name, int age){
        super(name,age);
    }
    @Override
    public void say() {
        System.out.println("学生姓名"+getName()+",年龄"+getAge()+".老师负责提问问题");
    }
}

Test类

public class Test {
    public static void main(String[] args) {
        Student stu=new Student("张三",23);
        stu.say();
        Teacher t =new Teacher("李四",24);
        t.say();
    }
}

结果展示