class, interface or enum exptected java program

Hello!

So i get this errormessage when i try to compile my java code in CMD to check it you know. I get the Class, interface or enum expected error as feedback. What to do? I am new to programming and I dont see where i did wrong! Would love if someone could take a quick look and help me, cant see the issue! :(

Code:

package ex ;

public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); int amount = 0; int choice = 0; int[] transactions = new int[10]; int sum = 0; int balance = 0;

     while(choice != 4)
     {
         choice = menu();
         switch(choice)
         {
         case 1:
             System.out.print("Vilken summa vill du sätta in? ");
             sum = keyboard.nextInt();
             if(sum == 0)
             {
                 System.out.print("Du har angett ett felaktigt belopp");
                 System.out.println();
                 System.out.println();
             }
             else
             {
                 amount = (int) + sum;
                 makeTransactions(amount, transactions);
             }
             break;
         case 2:
             System.out.print("Vilken summa vill du ta ut? ");
             sum = keyboard.nextInt();
             if(sum == 0)
             {
                 System.out.print("Du har angett ett felaktigt belopp");
                 System.out.println();
                 System.out.println();
             }
             else
             {
                 amount = (int) - sum;
                 makeTransactions(amount, transactions);
             }
             
             break;
         case 3:
             showTransactions(transactions, balance);
             break;
         case 4:
             System.out.println("Du valde att avsluta!");
             break;
             
         }
         
     }
     
 }
 
     public static int menu()
     {
         Scanner keyboard = new Scanner(System.in);
         int choice = 0;
         
         System.out.println("Enkel Bankomat");
         System.out.println();
         System.out.println("1. Insättning");
         System.out.println("2. Uttag");
         System.out.println("3. Saldobesked");
         System.out.println("4. Avsluta");
         System.out.println();
         System.out.print("Ditt val: ");
         
         choice = keyboard.nextInt();
         
         return choice;
         
     }
     
     
     public static void showTransactions(int[] transactions, int balance)
     {
         System.out.println();
         System.out.println("Tidigare transaktioner: ");
         System.out.println();
         
         for(int i = 0; i < transactions.length; i++)
         {
             if(transactions[i] == 0)
             {
                 System.out.print("");
             }
                 
             else
             {
                 System.out.print(transactions[i] + "\n");
                 balance = balance + transactions[i];
             }
             
         }
         System.out.println();
         System.out.println("Saldo: " + balance + " kr" + "\n");
         System.out.println();
         
     }
     
     public static void makeTransactions(int amount, int[] transactions)
     {
         
         int position = findNr(transactions);
         if (position == -1)
         {
             moveTrans(transactions);
         }
         else
         {
             
             transactions[position] = amount;
         }
     }
     
     public static int findNr(int[] transactions)
     {
         int position = -1;
         
         for(int i = 0; i < transactions.length; i++)
         {
             if (transactions[i] == 0)
             {
                 position = i;
                 break;
             }
         }
         return position;
     }
     
     public static void moveTrans(int[] transactions)
     {
         for(int i = 0; i < transactions.length; i++)
         
             transactions[0] = transactions[i + 1];
     }
     

}