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;}
}