1、Pet 父類

package com.hanqi.maya.model;

import java.util.Date;

/**
 * 寵物類
 * 健康值不能小於5
 * 饑餓值5~95
 * 開心值：如果小於30，每次有活動，健康值-2
 * 
 * @author asus
 *
 */
public abstract class Pet {
    private String name;
    private String sex;
    private int age;
    private Date createtime;
    private int happy;
    
 
private int healthy;
    private int hungry;
    private boolean isAlive;
    
    public Pet(String name, String sex) {
        super();
        this.name = name;
        this.sex = sex;
        this.age = 1;
        this.createtime = new Date();  //註意Date
        this.happy = 90;
        this.healthy = 100;
        
 
this.hungry = 80;
        this.isAlive = true;
    }
    
    public abstract void eat();//含有抽象方法的類必須聲明為抽象類，所以類名那裏也要加上abstract
    public abstract void play();
    public abstract void hospital();
    
    public void check(){
        if(healthy < 5 || hungry < 5 || hungry > 95){
            isAlive 
 
= false;        
        }
        if(happy < 30){
            healthy -= 2;
        }
        if(healthy > 100){
            healthy = 100;
        }
        if(happy > 100){
            happy = 100;
        }
        this.setAge((int)((System.currentTimeMillis() - createtime.getTime()) /1000 /5) + 1);
    }
    
    public void showInfo(){
        check();
        System.out.println("寵物信息：");
        System.out.println("\t名字: "+name+",性別: "+sex+",年齡: "+age);//  \t轉義制表符，相當於Tab鍵
        System.out.println("\t開心值: "+ happy);
        System.out.println("\t健康值: "+ healthy);
        System.out.println("\t饑餓值: "+ hungry);
    }
    
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public Date getCreatetime() {
        return createtime;
    }
    public void setCreatetime(Date createtime) {
        this.createtime = createtime;
    }
    public int getHappy() {
        return happy;
    }
    public void setHappy(int happy) {
        this.happy = happy;
    }
    public int getHealthy() {
        return healthy;
    }
    public void setHealthy(int healthy) {
        this.healthy = healthy;
    }
    public int getHungry() {
        return hungry;
    }
    public void setHungry(int hungry) {
        this.hungry = hungry;
    }


    public boolean isAlive() {
        return isAlive;
    }


    public void setAlive(boolean isAlive) {
        this.isAlive = isAlive;
    }
}

2、Rabbit 子類

package com.hanqi.maya.model;

public class Rabbit extends Pet {

    public Rabbit(String name, String sex) {
        super(name, sex);
    }

    @Override
    public void eat() {
        if(this.isAlive()){
            check();
            System.out.println(this.getName() + "拿到一根蘿蔔在吃，饑餓值-20");
            this.setHungry(this.getHungry() - 20);
            check();
        }else{
            System.err.println("你的寵物掛了");
        }    
    }

    public void play() {
        if(this.isAlive()){
            check();
            System.out.println(this.getName() + "玩了一個魔方，饑餓值+5，開心值+10");
            this.setHungry(this.getHungry() + 5);
            this.setHappy(this.getHappy() + 10);
            check();
        }else{
            System.err.println("你的寵物掛了");
        }    
        
    }

    public void hospital() {
        if(this.isAlive()){
            check();
            System.out.println(this.getName() + "在醫院裏哇哇叫，饑餓值+20，健康值+50");
            this.setHungry(this.getHungry() + 20);
            this.setHealthy(this.getHealthy() + 50);
            check();
        }else{
            System.err.println("你的寵物掛了");
        }    
        
    }
    
}

3、Main方法

package com.hanqi.maya.text;

import java.util.Scanner;

import com.hanqi.maya.model.Pet;
import com.hanqi.maya.model.Rabbit;

public class Main {
    public static void main(String[] args) {
        //Pet p = new Rabbit("旺財", "男");
        //p.showInfo();
        Pet p = null;
        
        Scanner scanner = new Scanner (System.in);
        
        boolean selectFlag = true;
        boolean circleFlag = true;
        /*
        System.out.println("請輸入寵物類型");
        System.out.println("1--兔子");
        */
        while(circleFlag){
            if(selectFlag){
                String s = scanner.nextLine();
                System.out.println("輸入寵物的姓名和性別，用逗號分開");
                String info = scanner.nextLine();
                String[] infos = info.split(",");
                if("1".equals(s)){
                    p = new Rabbit(infos[0],infos[1]);
                    selectFlag = false;
                }
            }
            printControl();
            String ss = scanner.nextLine();
            if("1".equals(ss)){
                p.showInfo();
            } else if("2".equals(ss)){
                p.eat();
            } else if("3".equals(ss)){
                
            } else if("4".equals(ss)){
                
            } else if("5".equals(ss)){
                System.out.println("再見");
                circleFlag = false;
            } else{
                System.out.println("無此操作");
            }
        }
        scanner.close();
    }
    private static void printControl(){
        System.out.println("輸入想進行的操作");
        System.out.println("1---顯示信息");
        System.out.println("2---吃飯");
        System.out.println("3---玩遊戲");
        System.out.println("4---去醫院");
        System.out.println("5---退出");
    }
}

電子寵物加強版