The following code in Java is supposed to represent a vending machine that termi

Question

The following code in Java is supposed to represent a vending machine that terminates the program when "X" is selected and gives an invalid entry when the Money variable is less than or equal to zero. There is a problem in the code for the second half and I cannot figure out what it is. Please help me figure out what this problem is!

import java.util.Scanner;
public class VendingMachine1 {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       Scanner scan = new Scanner(System.in);
       double money = 0;
       final double milk = 2.50;
       final double soda = 2.25;
       final double candybar = 1.25;
       final double gummybears = 1.50;
       final double chips = 1.00;
       int quantitymilk =5;
       int quantitysoda =4;
       int quantitycandybar =5;
       int quantitygummybear =6;
       int quantitychips =6;
      
       String selection="";
       while (money >= 0 &&!selection.equalsIgnoreCase("X"))   {
           System.out.println("Welcome to Patrick's Vending Machine! We have all sorts of goodies for you:");
           System.out.println(" Item Price Quantity");   //Start of the table
          
           System.out.println("Milk $2.50 " +quantitymilk);           //Price of Milk and Quantity
          
           System.out.println("Soda $2.25 " +quantitysoda);           //Price of Soda and Quantity
          
           System.out.println("Candy Bar $1.25 " +quantitycandybar);       //Price of Candy Bar and Quantity
          
           System.out.println("Gummy Bears $1.50 " +quantitygummybear);       //Price of Gummy Bears and Quantity
          
           System.out.println("Chips $1.00 " +quantitychips);           //Price of Chips and Quantity
          
          
           System.out.println("What is the amount of money you wish to spend?");
           money =scan.nextDouble();
           if (money >= 0);   {
               System.out.println("The amount of money you wish to spend is " + money);
           }
          
           while (!selection.equalsIgnoreCase("X"))   {
               System.out.println("Please select an option:");
               System.out.println("A-Milk B-Soda C-Candy Bar D-Gummy Bear E-Chips X-Escape");
               selection =scan.next();
               if (selection.equalsIgnoreCase("A"))   {
                   quantitymilk--;
                   money = money -milk;
                   System.out.println("You have selected Milk. You have:" + money);
               }
               if (selection.equalsIgnoreCase("B"))   {
                   quantitysoda--;
                   money = money -soda;
                   System.out.println("You have selected Soda. You have:" + money);
               }
               if (selection.equalsIgnoreCase("C"))   {
                   quantitycandybar--;
                   money = money -candybar;
                   System.out.print("You have selected Candy Bar. You have:" + money);
               }
               if (selection.equalsIgnoreCase("D"))   {
                   quantitygummybear--;
                   money = money -gummybears;
                   System.out.println("You have selected Gummy Bears. You have:" + money);
               }
               if (selection.equalsIgnoreCase("E"))   {
                   quantitychips--;
                   money = money -chips;
                   System.out.println("You have selected Chips. You have:" +money);
               }
               if (selection.equalsIgnoreCase("X"))   {
                   System.out.println("Thank you for choosing Patrick's Vending Machine!");
               }
           }
      
       }
      
  
  
  
  
   }
  
}
   

Explanation / Answer

import java.util.Scanner;
public class VendingMachine1 {
   public static void main(String[] args) {
       // TODO Auto-generated method stub
       Scanner scan = new Scanner(System.in);
       double money = 0;
       final double milk = 2.50;
       final double soda = 2.25;
       final double candybar = 1.25;
       final double gummybears = 1.50;
       final double chips = 1.00;
       int quantitymilk =5;
       int quantitysoda =4;
       int quantitycandybar =5;
       int quantitygummybear =6;
       int quantitychips =6;
       String selection="";
       while (money >= 0 &&!selection.equalsIgnoreCase("X"))   {
           System.out.println("Welcome to Patrick's Vending Machine! We have all sorts of goodies for you:");
           System.out.println(" Item Price Quantity");   //Start of the table
           System.out.println("Milk $2.50 " +quantitymilk);           //Price of Milk and Quantity
           System.out.println("Soda $2.25 " +quantitysoda);           //Price of Soda and Quantity
           System.out.println("Candy Bar $1.25 " +quantitycandybar);       //Price of Candy Bar and Quantity
           System.out.println("Gummy Bears $1.50 " +quantitygummybear);       //Price of Gummy Bears and Quantity
           System.out.println("Chips $1.00 " +quantitychips);           //Price of Chips and Quantity
           System.out.println("What is the amount of money you wish to spend?");
           money =scan.nextDouble();
          if (money >= 0) {
               System.out.println("The amount of money you wish to spend is " + money);
           while (!selection.equalsIgnoreCase("X"))   {
               System.out.println("Please select an option:");
               System.out.println("A-Milk B-Soda C-Candy Bar D-Gummy Bear E-Chips X-Escape");
               selection =scan.next();
               if (selection.equalsIgnoreCase("A"))   {
                   quantitymilk--;
                   money = money -milk;
                   System.out.println("You have selected Milk. You have:" + money);
               }
               if (selection.equalsIgnoreCase("B"))   {
                   quantitysoda--;
                   money = money -soda;
                   System.out.println("You have selected Soda. You have:" + money);
               }
               if (selection.equalsIgnoreCase("C"))   {
                   quantitycandybar--;
                   money = money -candybar;
                   System.out.print("You have selected Candy Bar. You have:" + money);
               }
               if (selection.equalsIgnoreCase("D"))   {
                   quantitygummybear--;
                   money = money -gummybears;
                   System.out.println("You have selected Gummy Bears. You have:" + money);
               }
               if (selection.equalsIgnoreCase("E"))   {
                   quantitychips--;
                   money = money -chips;
                   System.out.println("You have selected Chips. You have:" +money);
               }
               if (selection.equalsIgnoreCase("X"))   {
                   System.out.println("Thank you for choosing Patrick's Vending Machine!");
               }
           }
          }
        else{
               System.out.println("Invalid Entry");
           }
        
       }
   }
}

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