FixedRandom.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

public class FixedRandom {
    public static void main(String[] args) {
        long seed = 2017L;

        List<Integer> xs = new Random(seed).ints(20, 0, 19).collect(ArrayList::new, ArrayList::add, ArrayList::addAll);
        System.out.println(xs);

        Random r = new Random(seed);
        List<Integer> ys = new ArrayList<>();
        for (int i = 0; i < 20; ++i) {
            ys.add(r.nextInt(19));
        }
        System.out.println(ys);

        Random r2 = new Random(seed);
        int[] zs = new int[20];
        for (int i = 0; i < zs.length; ++i) {
            zs[i] = r2.nextInt(19);
        }
        System.out.println(Arrays.toString(zs));
    }
}