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Thread: Problem with returning integer values

  1. #1
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    Default Problem with returning integer values

    Hello! I am finishing up my final project for my Intro to Computer Science class that requires me to create a menu method that utilizes other class programs. One of the classes is stressing me out the most and its because I cant figure out a way to return several integers. Would anyone be able to help me come up with the lines of code that allow me to return the "Ball" values of the program as a list?

     
    import java.util.Random;
    import java.util.*;
     
    public class LottoClass
    {
       public static int Lottery()
       {
       int ball1 = 0;
       int ball2 = 0;
       int ball3 = 0;
       int ball4 = 0;
       int ball5 = 0;
       int powerBall = 0;
     
       ball1 = (int)(Math.random()*59) + 1;
       powerBall = (int)(Math.random()*32) + 1;
     
       while (ball2 == ball1 || ball2 == ball3 || ball2 == ball4 || ball2 == ball5
            || ball3 == ball1 || ball3 == ball4 || ball3 == ball5 || 
            ball4 == ball5 || ball4 == ball1 ||  
           ball5 == ball1 ) 
       {
         ball2 = (int)(Math.random()*59) + 1;
         ball3 = (int)(Math.random()*59) + 1;
         ball4 = (int)(Math.random()*59) + 1;
         ball5 = (int)(Math.random()*59) + 1;
       }
     
       /**
       return ball1, ball2, ball3, ball4, ball5
       */
     
       return;
     
          }
       public static int Powerball()
       {
          int powerBall = 0;
     
          powerBall = (int)(Math.random()*32) + 1;
     
          return (powerBall);
       }   
     
    }
    Last edited by Spootdude; December 1st, 2018 at 03:04 PM.

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Problem with returning integer values

    return the "Ball" values of the program as a list?
    Define a List like an ArrayList, add the "Ball" values to the list and return the list.
    Define the method to return a List instead of an int.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Problem with returning integer values

    In addition to what Norm said, if, say in the future, you want to return several arbitrary values (e.g. a String, an int, and a List) all at once, simply create a simple class to house the values and return an instance of that.

    Regards,
    Jim

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    Default Re: Problem with returning integer values

    Thank you so much for the replies, and I was able to have the class return the array list values, however I'm having trouble in my main program access these values. I/m not able to define it as an int so how do I go by doing this to print it?

     
       /**
       Part of class code
       */
     
       ArrayList<Integer> numbers = new ArrayList<Integer>();
       numbers.add(ball1);
       numbers.add(ball2);
       numbers.add(ball3);
       numbers.add(ball4);
       numbers.add(ball5);
     
       return (numbers);

     
    /** 
    Part of main code
    */
     
    public static void LottoUI() 
       {
          Scanner userInput = new Scanner(System.in);
     
          System.out.println();
          System.out.println("Hello, here's your lottery numbers: ");
     
          LottoClass myLotto = new LottoClass();
     
          Integer LTO = myLotto.Lotto();
          /**
          Add list of arrays
          */
     
          int PB = myLotto.Powerball();
     
          System.out.print(LTO);
     
          System.out.println("Power ball number is: " + PB);
          System.out.println();
          System.out.println();
     
     
       }


    --- Update ---

    Not more than 5 minutes after I was able to figure it out! Thank you for the help!

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: Problem with returning integer values

    not able to define it as an int
    What error message do you get from the compiler?
    Please copy the full text of the error message and paste it here.
    If you don't understand my answer, don't ignore it, ask a question.

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