Java Generate Random Number Between Two Given Values

To generate a random number between two given values in Java, you can use the nextInt method of the java.util.Random class. For example:

---

import java.util.Random;

public class Main {
    public static void main(String[] args) {
        int min = 10;
        int max = 20;

        // Generate a random number between min and max
        Random r = new Random();
        int randomNumber = r.nextInt((max - min) + 1) + min;

        System.out.println("Random number: " + randomNumber);
    }
}

This will generate a random integer between 10 (inclusive) and 20 (inclusive). The nextInt(n) method returns a value from 0 to n-1, so adding (max - min) + 1 ensures the upper bound is included.

You can also use the nextDouble method to generate a random double between two values. For example:

---

import java.util.Random;

public class Main {
    public static void main(String[] args) {
        double min = 10.0;
        double max = 20.0;

        // Generate a random number between min and max
        Random r = new Random();
        double randomNumber = min + (max - min) * r.nextDouble();

        System.out.println("Random number: " + randomNumber);
    }
}

This will generate a random double between 10.0 (inclusive) and 20.0 (exclusive).

For modern Java applications, ThreadLocalRandom is often preferred for its performance and simpler API: ThreadLocalRandom.current().nextInt(min, max + 1).