Java基础 5.10

1.方法重写课堂练习

package com.logic.override_;
//编写一个Person类 包括属性/private(name, age) 构造器 方法say(返回自我介绍的字符串)
//编写一个Student类 继承Person类 增加id score 属性/private 以及构造器
//定义say方法(返回自我介绍的信息)
//在main中 分别创建Person和Student对象 调用say方法输出自我介绍
public class OverrideExercise {
    public static void main(String[] args) {
        Student student = new Student("logic", 18, 100, 123);
        Person person = new Person("Lucy", 19);
        System.out.println(person.say());
        System.out.println(student.say());
    }
}

package com.logic.override_;

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

    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 String say() {
        return "Hello " + name + " " + age;
    }
}

package com.logic.override_;

public class Student extends Person {
    private double score;
    private int id;

    public Student(String name, int age, double score, int id) {
        super(name, age);
        this.score = score;
        this.id = id;
    }

    public double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String say() {
        return super.say() + ", score: " + score + ", id: " + id;
    }
}