java 键盘输入与全局变量

import java.util.Scanner;
public class Test {

    private static String num;
    private static String cla;
    private static String name;
    public static void main(String[] args) {
        m1();
        System.out.println("姓名"+name+"\n"+"学号"+num+"\n"+"班级"+cla+"\n");
        }
    public static void m1(){
        Scanner s= new Scanner(System.in);
        System.out.println("请输入名字：");
         name = s.nextLine();
        System.out.println("请输入学号：");
         num=s.nextLine();
        System.out.println("请输入班级：");
         cla=s.nextLine();
        }
}