Rectangle of N x N Start - Drawing with Loops

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int numberOfStars = Integer.parseInt(input.nextLine());

        for (int i = 0; i < numberOfStars; i++) {
            System.out.println(repeatStr("* ", numberOfStars));
        }

    }
    public static String repeatStr(String str, int count) {
        StringBuilder stars = new StringBuilder();

        for (int i = 0; i < count; i++) {
            stars.append(str);
        }
        return stars.toString();
    }
}