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Thread: Very simple question (nextDouble- Random class)

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    Default Very simple question (nextDouble- Random class)

    *
    If I change the method to nextInt, it works fine though. How can I use nextDouble without getting the error message? Method next.Double cannot be applied. Required : no arguments, Found: int. Keep in mind, I need the values of the randoms to be in the range 10-20.


     
    import java.util.Random;
     
     
    class Randoms
    {
        public static void main (String[] args)
        {
            Random r = new Random();
     
     
            for (int x = 0; x < 10000; x++)
            {
     
            double random = r.nextDouble(10) + 10;           // This line is not working. *
            System.out.println(random);
            }
        }
     
    }


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    Default Re: Very simple question (nextDouble- Random class)

    There is no param to nextDouble(). It returns a number between 0.0 and 1.0.

    One way of getting it to do it with 10 is to multiply the result of nextDouble by 10 and put it in a double variable.

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    TSSF44 (October 27th, 2013)

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    Default Re: Very simple question (nextDouble- Random class)

    Quote Originally Posted by GoodbyeWorld View Post
    There is no param to nextDouble(). It returns a number between 0.0 and 1.0.

    One way of getting it to do it with 10 is to multiply the result of nextDouble by 10 and put it in a double variable.
    Thank you. That's what I thought. My professor insists that I use nextDouble. By doing what you said, I can get the range from 10 to 20? It seems to be 0 - 10.

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    Default Re: Very simple question (nextDouble- Random class)

    Then add 10 to that result. C'mon, think!

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    TSSF44 (October 27th, 2013)

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    Default Re: Very simple question (nextDouble- Random class)

    Quote Originally Posted by GregBrannon View Post
    Then add 10 to that result. C'mon, think!
    Thanks, I figured it out after posting that. I shouldn't be so quick to ask questions.

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