Generating a random long number between min and max.

Main.java

import java.util.Random;

public class Main {
    public static long generateRandom(long min, long max) {
        double rValue = new Random().nextDouble();
        return (long) ((rValue * max) + ((1.0 - rValue) * min) + rValue);
    }

    public static void main(String[] args) {
        System.out.println(generateRandom(1, Long.MAX_VALUE));
    }
}