java代码示例（7-1）

Dog类

 /***
  * 宠物狗狗类，使用权限修饰符private和public进行封装
  * @author chenyanlong
  * 日期:2017/10/15
  */
 package com.hp.test07;

 public class Dog {

      //定义变量
     private String name;//昵称
     private int health;//健康值
     private int love;//亲密度
     private String  strain;//设置狗狗的品种

     /*通过吃饭增加健康值*/
     public void eat(){
         if(health>=100){
             System.out.println("狗狗"+name+"需要运动了");
         }else{
             health=health+5;
             System.out.println("主人,"+name+"吃饱了！");
         }
     }

     /*通过与主人玩游戏增加亲密度，但同时减少健康值*/
     public void play(){
         if(health<20){
             System.out.println("主人，"+name+"生病了");
         }else{
             health=health-3;
             love=love+5;
         }
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public int getHealth() {
         return health;
     }
     public void setHealth(int health) {
         this.health = health;
     }
     public int getLove() {
         return love;
     }
     public void setLove(int love) {
         this.love = love;
     }

     public String getStrain() {
         return strain;
     }

     public void setStrain(String strain) {
         this.strain = strain;
     }

     @Override
     public String toString() {
         return "Dog [name=" + name + ", health=" + health + ", love=" + love + ", Strain=" + strain + "]";
     }

 }

DogTest类：

package com.hp.test07;

import java.util.Scanner;

public class DogTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Dog dog=new Dog();

        System.out.println("----------------欢迎来到宠物店--------------");
        System.out.println("请选择需要领养的宠物品种：1.哈巴狗  2.牧羊犬");
        Scanner input=new Scanner(System.in);
        dog.setStrain(input.nextLine()); 

        System.out.println("请给你的爱犬起个好听的名字：");
        Scanner input1=new Scanner(System.in);
        dog.setName(input1.next());

        System.out.println("设定健康值：eg:80");
        Scanner input2=new Scanner(System.in);
        dog.setHealth(input2.nextInt());

        System.out.println("设定爱心值：eg:80");
        Scanner input3=new Scanner(System.in);
        dog.setLove(input3.nextInt());

        System.out.println(dog.toString());
    }

}

运行效果：