java面向对象，封装和继承之电子宠物应用

package Text;

public class Pet {
    protected String name;
    protected String sex;
    protected int age;
    protected int happy;
    protected int healthy;
    protected int hungry;
    
    
    public Pet(){}
    public Pet(String name, String sex){
        this.name =name;
        this.sex =sex;
        this.age =1;
        this.happy =80;
        this.healthy =100;
        this.hungry =80;
    }
    
    public void playGame(){
        if(!check()){
            System.out.println("各项属性值不能为负数！");
            return;
        }
        System.out.println("与"+this.name+"一起玩...");
        this.happy+=10;
        this.hungry+=10;
    }
    
    public void eat(){
        if(!check()){
            System.out.println("各项属性值不能为负数！");
            return;
        }
        System.out.println("与"+this.name+"一起吃饭...");
        this.happy+=10;
        this.healthy+=5;
        this.hungry-=20;
    }
    
    public boolean check(){
        if(this.happy>0&&this.healthy>0&&this.hungry>0){
            return true;
        }
        if(happy<0){
            happy =0;
        }
        if(healthy<0){
            healthy=0;
        }
        if(hungry<0){
            hungry=0;
        }
        return false;
    }
    
    
    
    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 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;
    }
        
}

package Text;

public class Cat extends Pet {
    
    public Cat(){}
    public Cat(String catName, String catSex){
        super(catName, catSex);
    }
    
    public void showInfo(){
        System.out.println("宠物名字:" +this.name);
        System.out.println("宠物性别:" +this.sex);
        System.out.println("宠物年龄:" +this.age);
        System.out.println("开心值:" +this.happy);
        System.out.println("健康值:" +this.healthy);
        System.out.println("饥饿值:" +this.hungry);
        System.out.println("==========================");
    }
}

package Tool;

import java.util.Scanner;

import Text.Cat;

public class Tool2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Cat a =new Cat("花花", "女");
        
        /*a.showInfo();
        a.playGame();
        a.eat();
        a.showInfo();*/
        
        Scanner scanner = new Scanner(System.in);
        boolean flag =true;
        while(flag){
            printControl();
            String c =scanner.nextLine();
            if("1".equals(c)){
                a.showInfo();
            }else if("2".equals(c)){
                a.eat();
            }else if("3".equals(c)){
                a.playGame();
            }else if("bye".equals(c)){
                flag =false;
            }else {
                System.out.println("功能尚未开启");;
            }
        }
        scanner.close();
    }
    
    public static void printControl(){
        System.out.println("1--显示信息");
        System.out.println("2--吃饭");
        System.out.println("3--玩游戏");
    }    
}