Question

I am working on porting an existing VB.Net application to Java, and could not find an equivalent to Random.Next(Int32, Int32).

I could find only java.util.Random.next(int val) in the Java API.

Is there an Equivalent of .Net framework’s Random.Next(Int32, Int32) in the Java API?

Answer 1

As Marc says, just adapt Random.nextInt(int), with a couple of sanity checks:

public static int nextInt(Random rng, int lower, int upper) {
    if (upper < lower) {
        throw new IllegalArgumentException();
    }
    if ((long) upper - lower > Integer.MAX_VALUE) {
        throw new IllegalArgumentException();
    }
    return rng.nextInt(upper-lower) + lower;
}