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Thread: Can't get 2 different randoms

  1. #1
    Junior Member
    Join Date
    Sep 2013
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    Default Can't get 2 different randoms

    Hi all.

    Making a simple maths game that takes a user input as an answer for the sum of two randomly generated numbers.

    Each time i run it, i get 7+7, 2+2, 3+3 etc, but never two different numbers.

    Any help would be much appreciated

    My code:

    import javax.swing.JOptionPane;
    public class Q3

    public static void main (String [] args)

    double first = Math.random()*10;
    int firstNumber = (int)first;
    double second = Math.random()*10;
    int secondNumber = (int)second;

    String userAnswerString = JOptionPane.showInputDialog("What is the sum of: " + firstNumber + "+" + secondNumber + " ?");
    double userAnswerDouble = Double.parseDouble(userAnswerString);
    int answer = (int)userAnswerDouble;

    if (answer == (firstNumber + secondNumber))
    System.out.println("Congratulations! You are Correct!");
    System.out.println("Sorry, that is wrong! The correct answer was: " + (firstNumber+secondNumber));

  2. #2
    Super Moderator
    Join Date
    Jun 2013
    So. Maryland, USA
    My Mood
    Thanked 698 Times in 680 Posts

    Default Re: Can't get 2 different randoms

    Please read the Announcement topic at the top of the sub-forum to learn how to post your code in code or highlight tags.

    I ran your code a couple times and always got two different numbers. Ensure you're running the latest version of your program. Delete all *.class files and recompile if you have to.

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