Zadataj u Javi, pomoć?

import java.util.Scanner;

public class DomaciZadatak {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Unesite n (velicinu niza): ");
        int n = in.nextInt();
        double niz[] = new double[n];
        System.out.println("Unosite brojeve: ");
        for (int i=0; i<n; i++) {
            niz[i] = in.nextDouble();
        }
        System.out.println("Uneti niz: ");
        for (int i=0; i<n; i++) {
            System.out.print(niz[i] + " ");
        }
        System.out.println();

        double[] nizRezultat = nadjiMinimumMaksimumNiza(niz);

        System.out.print("Minimalna vrednost niza: ");
        System.out.println(nizRezultat[0]);
        System.out.print("Maksimalna vrednost niza: ");
        System.out.println(nizRezultat[1]);
    }
    public static double[] nadjiMinimumMaksimumNiza(double[] arg0) {
        double max = Double.MIN_VALUE;
        double min = Double.MAX_VALUE;
        for (int i=0; i<arg0.length; i++) {
            if (arg0[i]>max) {
                max = arg0[i];
            }
        }
        for (int i=0; i<arg0.length; i++) {
            if (arg0[i] < min) {
                min = arg0[i];
            }
        }
        double[] nizRezultat = new double[2];
        nizRezultat[0] = min;
        nizRezultat[1] = max;

        return nizRezultat;
    }
}