NimGame.java

public class NimGame {
    static String doesFirstWin(int[] piles) {
        int n = piles.length;
        int x = piles[0];
        for (int i = 1; i < n; i++) {
            x ^= piles[i];
        }
        if (x != 0) {
            return "First";
        } else {
            return "Second";
        }
    }

    public static void main(String[] args) {
        int[] piles0 = {2, 1, 4};
        System.out.println(doesFirstWin(piles0));
        int[] piles1 = {1, 1};
        System.out.println(doesFirstWin(piles1));
    }
}