Rhombus Of Stars

import java.util.Scanner;

public class RhombusOfStars {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = Integer.parseInt(scan.nextLine());
        int Rows = n - 1;

        for (int i = 0; i <= Rows; i++) {
            System.out.print(repeatStr(" ", Rows - i) + "*");
            System.out.println(repeatStr(" *", i));

        }
        for (int i = Rows - 1; i >= 0; i--) {
            System.out.print(repeatStr(" ", Rows - i) + "*");
            System.out.println(repeatStr(" *", i));

        }

    }

    static String repeatStr(String text, int count) {
        StringBuilder sb = new StringBuilder();

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

    }

}