不使用数据库和IO流,编写学生管理系统,练习数组和循环的操作

import java.util.Scanner;

public class StuInf

{

public static void main(String[] args)

{

/*

3.实现学生管理（增加删除查询修改二维数组）

String[][] students = new String[][];

学生简单信息：姓名、年龄、学校

*/

String[][] students=new String[100][4];

String[] s1={"S001","张三1","25","组长1"};

String[] s2={"S002","张三2","26","组长2"};

String[] s3={"S003","张三3","27","组长3"};

String[] s4={"S004","张三4","28","组长4"};

students[0]=s1;

students[1]=s2;

students[2]=s3;

students[3]=s4;

int studentCount=4;

System.out.println("\n\n\t\t欢迎使用学生管理系统");

System.out.println("* * * * * * * * * * * * * * * * * * ** * * * * * * * *"); System.out.println("\n\n\t\t 1.登入系统\n");

System.out.println("\n\n\t\t 2.退出\n\n");

System.out.println("* * * * * * * * * * * * * * * * * * ** * * * * * * * *\n");

System.out.print("请输入数值：");

boolean flag=true;

while(flag)

{

Scanner input=new Scanner(System.in);

int choice=input.nextInt();

switch(choice)

{

case 1:

System.out.println("请选择登入!");

for(int i=1;i<=3;i++)

{

System.out.print("请输入用户名：");