How to generate random integers within specific range in Java

Question

The specific range is given and I want to print random integers within given range. How to do it?

Answer 1

To generate random integers within a specific range, I have tried the code given below.

public class RandomIntegers {

public static void main(String[] args) {

System.out.println("Double between 5.0 and 10.00: RandomDoubleNumber = "+getRandomDoubleBetweenRange(10.0, 100.00));

}

private static double getRandomDoubleBetweenRange(double min, double max) {

double x = (Math.random()*((max-min)+1))+min;

    return x;

}

}

Output of this code is: Double between 5.0 and 10.00: RandomDoubleNumber = 68.11912269349051

Hope this helps!

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Thanks!

Answer 2

You can achieve that concisely in Java:

Random random = new Random();

int maximum = 10;
int minimum = 5;
int totalNumber = 10;

IntStream stream = random.ints(totalNumber, minimum, maximum);
stream.forEach(System.out::println);