I am trying to generate a random number with Java, but random in a specific range. For example, my range is 5-10, meaning that 5 is the smallest possible value the
random number can take, and 10 is the biggest. Any other number in between these numbers is possible to be a value, too.
In Java, there is a method random() in the Math class, which returns a double value between 0.0 and 1.0. In the class Random there is a method nextInt(int n), which
returns a random value in the range of 0 (inclusive) and n (exclusive). I couldn't find a method, which returns a random value between two numbers.
I have tried the following things, but I still have problems: (minimum and maximum are the smallest and biggest numbers).
Solution 1 :
randomNum = minimum + (int)(Math.random()*maximum);
problem: randomNum takes is assinged values numbers bigger that maximum
Solution 2 :
Random rn = new Random();
int n = maximum - minimum + 1;
int i = rn.nextInt() % n;
randomNum = minimum + i;
problem: randomNum takes is assigned values smaller than minimum.
Could you suggest how to solve my problem, or point me to some references?
Thanks in advance!
Last updated:5/7/2013 7:48:49 AM