/*
   编程实现Person类的封装
 */
public class Person{
  //1.私有化成员变量，使用private关键字修饰
  private String name; 
  private int age;
  private String country;
  //使用static关键字修饰成员变量表示提升为类层级只有一份被所有对象共享
  //public static String country;
 
  //3.在构造方法中调用set方法进行合理值的判断
  public Person(){
  }
  public Person(String name, int age, String country){
    setName(name);
    setAge(age);
    setCountry(country);
  }
 
  //2.提供公有的get和set方法，在方法体中进行合理值的判断
  public String getName(){
    return name;
  }
  public void setName(String name){
    this.name = name;
  }
  public int getAge(){
    return age;
  }
  public void setAge(int age){
    if(age > 0 && age < 150){
      this.age = age;
    }else{
      System.out.println("年龄不合理！！！");
    }
  }
  public String getCountry(){
    return country;
  }
  public void setCountry(String country){
    this.country = country;
  }
 
  public void show(){
    System.out.println("我是" + getName() + "，今年" + getAge() + "岁了，来自" + getCountry() + "!");
  }
 
  //自定义成员方法描述吃饭的行为
  public void eat(String food){
    System.out.println(food + "真好吃！");
  }
  //自定义成员方法描述娱乐的行为
  public void play(String game){
    System.out.println(game + "真好玩！");
  }
}