静态static关键字修饰成员

package JavaStatic;

public class Demo01 {
    public static void main(String[] args){
        Stdunt one = new Stdunt("郭靖",18);
        one.room ="大数据一班";
        System.out.println("姓名：" + one.getName() + ",年龄" + one.getage()+ one.room+"，学号:" + one.getid());
        Stdunt tow = new Stdunt("黄蓉",16);
        System.out.println("姓名：" + tow.getName() + ",年龄" + tow.getage()+ tow.room+"，学号:" + tow.getid());
    }
}

package JavaStatic;

public class Stdunt {
    private int id; //学号
    private static int idCounter = 000;
    private String name;//姓名
    private int age;//年龄
    static String room;
    //无参构造
    public Stdunt() {
        this.id = idCounter++;
    }
    //有参构造
    public Stdunt (String name,int age){
        this.name = name;
        this.age = age;
        this.id = ++idCounter;
    }
    public void setName (String name){
        this.name = name;
    }
    public String getName(){
        return name;
    }

    public void setage (int age){
        this.age = age;
    }
    public int getage(){
        return age;
    }
    public void setid (int id){
        this.id = id;
    }
    public int getid (){
        return id;
    }
}