RandomGenerator API

Definition

Java 17 added the RandomGenerator interface and a factory with many modern algorithms. You pick an algorithm by name and can seed it, so the same seed always gives the same numbers.

Example code

A seeded generator gives repeatable numbers

import java.util.random.RandomGenerator;
import java.util.random.RandomGeneratorFactory;

class Demo {
    public static void main(String[] args) {
        RandomGenerator rng = RandomGeneratorFactory.of("Xoshiro256PlusPlus").create(42L);   // seed 42
        System.out.println(rng.nextInt(100));
        System.out.println(rng.nextInt(100));

        RandomGenerator same = RandomGeneratorFactory.of("Xoshiro256PlusPlus").create(42L);
        System.out.println(same.nextInt(100));     // same seed, same first number
    }
}

// Output:
// 0
// 67
// 0