package com.inmind.private02;
/*
构造方法的使用
 */
public class Demo04 {
    public static void main(String[] args) {
        //无参构造方法，创建学生对象
        Student s1 = new Student();
        s1.study("python");
        //满参构造方法，创建学生对象
        Student s2 = new Student("张三",18,1);
        s2.study("java");

        //第一天报名只知道学号
        Student s3 = new Student(43);
        System.out.println(s3.getId());
        s3.study("C++");
    }
}