Random Number Generator Biased To Numbers in the Middle of Range, Java, libGDX

Question

I am designing a game in libGDX which drops different sized rocks for the user to dodge.

My Question: How can I create a method which takes in a low and high int value, and returns a random number. However, I want this random number to be biased toward the middle of the range (similar to a normal distribution).

I would like the method to look something like this: public int randBiasInt(int low, int high) { }

Answer 1

Something to the sort of this should work...

public int getBiasedInt(int min, int max) {
    int rand = Math.random() * max;
    while (rand < min) {
        rand = Math.random();
    }
    int mid = (max / 2) - (min / 2);
    int halfmid = mid / 2;
    if (rand > mid) {
        rand -= Math.random() * halfmid;
    } else {
        rand += Math.random() * halfmid;
    }
    return rand;
}

Not the prettiest, I know. But it should be acceptable for what you desire...