Thread: 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);
        }
    }
 
}

Originally Posted by GoodbyeWorld

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.

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

Originally Posted by GregBrannon

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.