java--Demo3(注册登录)

旧城等待， 2022-06-04 09:44 246阅读 0赞

@Test  
public void test()\{  
String\[\]\[\] users=new String\[0\]\[2\];  
int index=0;  
int loginIndex=0;  
boolean flag=true;  
while(flag)\{  
System.out.println("1=注册；2=登录；3=退出");  
int x=new Scanner(System.in).nextInt();  
  
switch (x) \{  
case 1:  
boolean rgflag = true;  
while (rgflag) \{  
System.out.println("注册");  
System.out.println("请输入账号：");  
String username = new Scanner(System.in).next();  
System.out.println("请输入密码：");  
String userpassword = new Scanner(System.in).next();  
boolean isok = false;  
for (int i = 0; i < users.length; i++) \{  
String\[\] name = users\[i\];  
String ming = name\[0\];  
if (ming.equals(username)) \{  
isok = true;  
  
  
\}  
\}  
if (isok) \{  
System.out.println("该用户已存在，请重新注册！");  
\} else \{  
String\[\] yonghu = \{ username, userpassword \};  
users = Arrays.copyOf(users, users.length + 1);  
users\[index\] = yonghu;  
index++;  
System.out.println("注册成功，是否继续注册？y/n");  
String input = new Scanner(System.in).next();  
if (input.equals("n")) \{  
rgflag = false;  
\}  
\}  
\}  
break;  
  
  
case 2:  
System.out.println("登录");  
boolean loginTotleflag=true;  
while(loginTotleflag)\{  
System.out.println("请输入账号：");  
String username=new Scanner(System.in).next();  
boolean isok=false;  
for(int i=0;i<users.length;i++)\{  
String\[\] name=users\[i\];  
String ming=name\[0\];  
if(ming.equals(username))\{  
isok=true;  
loginIndex=i;  
\}  
\}  
if(isok)\{  
boolean loginflag=true;  
while(loginflag)\{  
System.out.println("请输入密码：");  
String userpassword=new Scanner(System.in).next();  
//for(int i=0;i<users.length;i++)\{  
String pwd=users\[loginIndex\]\[1\];  
if(pwd.equals(userpassword))\{  
System.out.println("登录成功suceess!!!!!！");  
loginflag=false;  
loginTotleflag=false;  
  
\}else\{  
System.out.println("密码不正确！！！");  
\}  
//\}  
\}  
  
\}else\{  
System.out.println("没有此用户，请重新输入");  
\}  
\}  
  
  
  
break;  
case 3:  
System.out.println("谢谢使用！");  
flag=false;  
break;  
  
default:  
System.out.println("输入有误！");  
break;  
\}  
\}  
\}