128

Code

    ///Name: Joshua Bautista
    ///Period: 6
    ///Date: 6/4/16
    
    import java.util.Scanner;
    import java.io.File;
    
    public class SSN {
        
        public static void main(String[] args) throws Exception {
            
            Scanner kb = new Scanner(System.in);
            
            System.out.println("Which file would you like to add from?");
            System.out.print("> ");
            String file = kb.next();
            System.out.println("");
            
            while (file.equals("5nums.txt") || file.equals("6nums.txt") || file.equals("7nums.txt") || file.equals("8nums.txt")) {
                
                Scanner reader = new Scanner(new File(file));
                int total = 0;
                
                while (reader.hasNext()) {
                    
                    int a = reader.nextInt();
                    
                    System.out.print(a + " ");
                    
                    total = total + a;
                }
                
                System.out.println("Total: " + total);
                System.out.println("");
                System.out.println("Which file would you like to add from?");
                System.out.print("> ");
                file = kb.next();
                System.out.println("");
            }
        }
    }
    

Picture of the output