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我試圖創建一個菜單系統,用戶選擇是否有管理員或客戶,然後他們可以輸入登錄詳細信息。如何在Java中創建嵌套菜單?
登錄管理員後,客戶會看到不同的菜單。我也希望能夠註銷,並且會返回到登錄菜單,詢問他們是否有管理員或客戶。
這是我到目前爲止有:
import java.util.Scanner;
public class Main {
public static void main(String[] args){
login login = new login();
Scanner in = new Scanner(System.in);
String user;
String pwd;
int loginOption = 0;
login.databaseConnection();
System.out.println("======================================");
System.out.println("| Please select and option: |");
System.out.println("======================================");
System.out.println("| Options: |");
System.out.println("| [1] Admin |");
System.out.println("| [2] Account Holder |");
System.out.println("| [3] Exit |");
System.out.println("======================================");
do{
System.out.print("Option:");
loginOption = in.nextInt();
// Switch construct
switch (loginOption) {
case 1:
System.out.println("");
System.out.println("Username: ");
user = in.next();
System.out.println("Password: ");
pwd = in.next();
System.out.println("");
break;
case 2:
System.out.println("");
System.out.println("Account Number: ");
user = in.next();
System.out.println("Password: ");
pwd = in.next();
System.out.println("");
if(login.validate_login(user, pwd)){
System.out.println("Valid Login");
System.out.println("");
System.out.println("Hello, Account Holder");
System.out.println("");
System.out.println("======================================");
System.out.println("| Please select and option: |");
System.out.println("======================================");
System.out.println("| Options: |");
System.out.println("| [1] Check balence |");
System.out.println("| [2] Withdraw |");
System.out.println("| [3] Logout |");
System.out.println("======================================");
int userOption = 0;
do{
System.out.println("Option");
userOption = in.nextInt();
switch (userOption){
case 1:
break;
case 2:
break;
case 3:
loginOption = 3;
break;
}
}while (loginOption != 3);
}else{
System.out.println("Invalid");
}
break;
case 3:
System.out.println("Exit selected");
System.exit(0);
break;
default:
System.out.println("Invalid selection");
break; // This break is not really necessary
}
}while (loginOption != 3);
in.close();
}
}
我在他們時刻離開第二開關,回到第一個主要的問題。
任何幫助,將不勝感激:)
它在正確的'switch(loginOption){'1爲管理員或2爲客戶或3爲退出,將是真實的。如果你選擇1,它會詢問usarname,然後再次將它轉到main。 – Satya
@Satya yerr,它只是一旦他們輸入正確的登錄信息一個新的菜單顯示,我希望有一個選項,他們能夠註銷,並返回到他們選擇的地方,無論是管理員還是客戶。目前該程序剛剛結束 – IeuanW