需要幫助'如果沒有其他'

Question

嘿，人們我有一個問題要問關於Java。我遇到的問題是關於'else if'的錯誤。我不知道如何解決這個問題。如果我在終端或CMD中運行它會得到以下錯誤：'else without if'但我不知道如何解決這個問題。我真的很感激任何幫助。

import java.io.*; 
import java.util.*; 

public class JonesInc { 
    public static void main(String[] args) { 
     Scanner kbReader = new Scanner(System. in); 
     System.out.println("1. Administration"); 
     System.out.println("2. Check Stock Availability"); 
     System.out.println("3. Purchase Textbooks"); 
     System.out.println("4. Return Textbooks"); 
     System.out.println("5. Quit"); 
     System.out.println("please select your choice"); 
     int choice = kbReader.nextInt(); 
     int stock = 100; 

     if (choice == 1) { 
      Scanner password = new Scanner(System. in); 
      System.out.println("Please Enter Password"); 
      String name = password.nextLine(); 

      if (name.equals("Java")) { 
       System.out.println("A. Increase Stock Availabilty"); 
       System.out.println("B. Reduce Stock Availability"); 
       System.out.println("C. Quit"); 
       System.out.println("Select your choice"); 
       Scanner kbReader1 = new Scanner(System. in); 
       String choice1 = kbReader1.nextLine(); 
       char ch = choice1.charAt(0); 
       System.out.println(""); 



       switch (ch) { 
       case 'A': 
       case 'a': 

        System.out.println("How much do you wish to increase stock by"); 
        break; 

       case 'B': 
       case 'b': 

        System.out.println("How much do you wish to decrease stock by"); 
        break; 

       case 'C': 
       case 'c': 

        System.out.println("Dave is cool"); 
        break; 
       } else { 
        System.out.println("Wrong Password Entered 3 times Please contact the help desk"); 
       } 
      } else if (choice == 2) { 
       System.out.println("Check stock availability"); 
      } else if (choice == 3) { 
       System.out.println("How many Textbooks do you want to purchase"); 
      } else if (choice == 4) { 
       System.out.println("How many Textbooks do you want to return"); 
      } else if (choice == 5) { 
       System.out.println("Quit"); 
       enter code here 
      } 
     } 
    } 
} 

Answer 1

沒有}的switch後關閉if。

import java.io.*; 
import java.util.*; 

public class JonesInc { 
    public static void main(String[] args) { 
    Scanner kbReader = new Scanner(System. in); 
    System.out.println("1. Administration"); 
    System.out.println("2. Check Stock Availability"); 
    System.out.println("3. Purchase Textbooks"); 
    System.out.println("4. Return Textbooks"); 
    System.out.println("5. Quit"); 
    System.out.println("please select your choice"); 
    int choice = kbReader.nextInt(); 
    int stock = 100; 

    if (choice == 1) { 
     Scanner password = new Scanner(System. in); 
     System.out.println("Please Enter Password"); 
     String name = password.nextLine(); 

     if (name.equals("Java")) { 
     System.out.println("A. Increase Stock Availabilty"); 
     System.out.println("B. Reduce Stock Availability"); 
     System.out.println("C. Quit"); 
     System.out.println("Select your choice"); 
     Scanner kbReader1 = new Scanner(System. in); 
     String choice1 = kbReader1.nextLine(); 
     char ch = choice1.charAt(0); 
     System.out.println(""); 

     switch (ch) { 
      case 'A': 
      case 'a': 
      System.out.println("How much do you wish to increase stock by"); 
      break; 
      case 'B': 
      case 'b': 
      System.out.println("How much do you wish to decrease stock by"); 
      break; 
      case 'C': 
      case 'c': 
      System.out.println("Dave is cool"); 
      break; 
     } 
     } else { 
     System.out.println("Wrong Password Entered 3 times Please contact the help desk"); 
     } 
    } else if (choice == 2) { 
     System.out.println("Check stock availability"); 
    } else if (choice == 3) { 
     System.out.println("How many Textbooks do you want to purchase"); 
    } else if (choice == 4) { 
     System.out.println("How many Textbooks do you want to return"); 
    } else if (choice == 5) { 
     System.out.println("Quit"); 
    } 
    } 
}