封装

package com.wxt1.封装;

public class fengzhuang {
    public static void main(String[] args) {
        Person people = new Person();
        people.setAge(888);
        System.out.println(people.name + "----" + people.getAge());
    }
}

class Person {
    String name;
    private int age;  //私有变量只能再本类中使用

    public void setAge(int age) {
        this.age = age;
    }

    public int getAge() {
        return this.age;
    }
}