Question

My code works in eclipse, but not in Zybooks. I keep getting this error.

Exception in thread "main" java.util.NoSuchElementException at java.base/java.util.Scanner.throwFor(Scanner.java:937) at java.base/java.util.Scanner.next(Scanner.java:1478) at Main.main(Main.java:34)

Your output

Welcome to the food festival! Would you like to place an order?

Expected output

This test case should produce no output

in java

import java.util.Scanner;

public class Main
{
   public static void display(String menu[])
   {
       for(int i=0; i<menu.length; i++)
       {
           System.out.println (i + " - " + menu[i]);
       }
       System.out.print ("Enter the number for your selection: ");
   }


   public static void main (String[] args)
   {
     
       String mainMenu[] = {"Nothing", "Appetizer", "Main Course", "Dessert"};
       String dessertMenu[] = {"Nothing", "Chocolate Cake", "Ice Cream", "Brownie"};
       String appetizerMenu[] = {"Nothing", "Shrimp", "Bread", "Mozerella Sticks"};
       String mainCourseMenu[] = {"Nothing", "Burgers", "Fish", "Pasta"};
       String toppingsMenu[] = {"Nothing", "Cheese", "Sprinkles", "Syrup"};
    
       String list = "";
    
     
       @SuppressWarnings("resource")
   Scanner sc = new Scanner(System.in);
    
       System.out.println ("Welcome to the food festival!");
       System.out.print ("Would you like to place an order?");
       String ans = sc.next();
    
       if(ans.equals("NO"))
       {
           System.out.println ("NO:(user answered NO)");
           System.out.println ("Thank you for stopping by, maybe next time you'll sample our menu");
           return;
       }
    
       if(ans.equals("YES"))
       {
           System.out.println ("YES:(user answered YES)");
         
           System.out.print ("What is your name for the order?");
           String name = sc.next();
        
           int m, n, k;
        
        
           System.out.println ("Select from menu, " + name);
           while(true)
           {
               display(mainMenu);
            
               n = sc.nextInt();
               if(n==0) break;
               switch(n)
               {
                   case 1:
                       System.out.println ("Appetizer Menu:");
                       display(appetizerMenu);
                    
                       m = sc.nextInt();
                       list = list + "Appetizer:[" + appetizerMenu[m] + ": ";
            
                       while(true){
                           display(toppingsMenu);
                           k = sc.nextInt();
                           if(k==0) break;
                           list = list + toppingsMenu[k] + " ";
                       }
                       list = list + "]\n";
                       break;
                     
                
                   case 2:
                       System.out.println ("Main Course Menu:");
                       display(mainCourseMenu);
                    
                       m = sc.nextInt();
                       list = list + "Main Course: [" + mainCourseMenu[m] + "]\n";
            
                       break;
                   case 3:
                       System.out.println ("Dessert Menu:");
                       display(dessertMenu);
                    
                       m = sc.nextInt();
                       list = list + "Dessert: [" + dessertMenu[m] + "]\n";
            
               }
           }
       }      
           System.out.println ("Here is your order ");
           System.out.println (list);
           System.out.println ("Enjoy your meal!");
            
       }
   }

Answer 1

step1 Add sc.nextLine() in line 33 ie in the first whileloop as the error is in line 34 . It will solve the problem .

step2   Use try Catch method block in the display method of main to avoid abrupt execution of program and this will handle Excepion in thread "main" also it helps you to configure the exact mistakes while coding by defining a block of code to be executed

No such Element Exception occurs while using Enumeration or iteration when the element requested doesnot exist which can be solved by using next() method as it returns the next element in iteration

any way the output will have

Welcome to the Food Festival! wuld you like to place an order?

later according to input given  either "yes" or "no" the program proceeds to give output ie if ans=yes

user answered yes

what is your name for the order and so on the program carryon by taking menu

if ans=no

user answered No

Thankyou for stopping by, maybe next time you'll sample our menu

hope it helped you