设计一个People类。声明一个Person类私有化属性name和age并将字段封装起来;在Person类中定义一个talk方法打印姓名和年龄信息;在main方法中声明并实例化一Person对象p 给p中的属性赋值调用talk方法打印我是张三今年18岁

public class Person { private String name; private int age;

public void setName(String name) {
    this.name = name;
}

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

public void talk() {
    System.out.println("我是:" + name + ", 今年:" + age + "岁");
}

}

public class Main { public static void main(String[] args) { Person p = new Person(); p.setName("张三"); p.setAge(18); p.talk(); } }