第 1 部分 案例：教师与学生

package com.itheima_07;

public 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;
    }
}

package com.itheima_07;

public class Teacher extends Person{
    public Teacher(){}

    public Teacher(String name,int age){
        super(name,age);
    }

    public void teach(){
        System.out.println("用爱成就每一位学员");
    }
}

package com.itheima_07;

public class Student extends Person{
    public Student(){}

    public Student(String name,int age){
        super(name,age);
    }
    public void study(){
        System.out.println("好好学习，天天向上");
    }
}

package com.itheima_07;

/*
 * 测试类
 * */
public class Demo {
    public static void main(String[] args) {
        //创建老师类对象进行测试
        Teacher t1 = new Teacher();
        t1.setName("曹巧梦");
        t1.setAge(30);
        System.out.println(t1.getName() + "," + t1.getAge());
        t1.teach();


        Teacher t2 = new Teacher("方宾", 22);
        System.out.println(t2.getName() + "," + t2.getAge());
        t2.teach();

        //创建学生类对象进行测试
        Student s1 = new Student();
        s1.setName("曹巧梦");
        s1.setAge(30);
        System.out.println(s1.getName() + "," + s1.getAge());
        s1.study();


        Student s2 = new Student("方宾", 22);
        System.out.println(s2.getName() + "," + s2.getAge());
        s2.study();
    }
}