100天代码提升计划-第6天

前言

今天是星期六，学习与不学习也一直在我的脑海里做斗争，学习与不学习都有各自的理由，最终依旧选择学习，因为害怕一旦自己停下来就变得懒惰，变得懈怠，无论自己学一节课还是半节课也要坚持学下去。加油！！！

 

 

 

正文

静态static关键字描述

一旦使用static关键字那么内容不属于自己属于类

package Demo02;

public class Demo01Static {
    public static void main(String[] args) {
        Student one =new Student("张三",23);
        one.room ="101教室";
        System.out.println("姓名:"+one.getName()+",年龄:"
                +one.getAge()+"，教室:"+one.room+",学号："+one.getId());
        Student two =new Student("李四",34);
        System.out.println("姓名:"+two.getName()+",年龄:"
                +two.getAge()+"，教室:"+two.room+",学号："+two.getId());

    }
}

package Demo02;

public class Student {
    private  String name;//姓名
    private  int age;//年龄
    static String room;//所在教室
    private int id;
    private  static  int jsq=100;


    public Student(){
        this.id=++jsq;
    }
    //有参构造
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
        this.id=++jsq;
    }
    //全参构造

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

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