Java封装练习编写Person类案例代码

题目描述

使用封装编写Person类。要求：类具有姓名、年龄、体重；其中，如年龄小于等于0岁，则输出“年龄出错，使用默认18岁代替”；如体重小于等于0，则输出“体重出错，使用默认100斤代替”；

编写方法talk(),输出“我是：XX,今年：XX岁”；为各属性设置赋值和取值方法；在控制台输出相关信息

案例代码

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

    public Person(String name, int age, double weight) {
        setName(name);
        setAge(age);
        setWeight(weight);
    }

    public void talk() {
        System.out.println("我是：" + name + "，今年：" + age + "岁");
    }

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

    public void setAge(int age) {
        if (age <= 0) {
            System.out.println("年龄出错，使用默认18岁代替");
            this.age = 18;
        } else {
            this.age = age;
        }
    }

    public void setWeight(double weight) {
        if (weight <= 0) {
            System.out.println("体重出错，使用默认100斤代替");
            this.weight = 100;
        } else {
            this.weight = weight;
        }
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public double getWeight() {
        return weight;
    }

    public static void main(String[] args) {
        Person person = new Person("张三", -5, 70);
        person.talk();
        System.out.println("姓名：" + person.getName());
        System.out.println("年龄：" + person.getAge());
        System.out.println("体重：" + person.getWeight());
    }
}