romb.java

romb.java

public class Main {

    public static void main(String[] args) {
        romb(10);
    }

    private static void romb (int k){
        for (int i = 0; i < k; i++){
            print_star(k, i);
        }

        for (int i = k-2; i >= 0; i--){
            print_star(k, i);
        }
    }

    private static void print_star(int k, int i) {
        for (int j = 0; j<(k*2-(i*2+1))/2; j++)
            System.out.print(" ");

        for (int j = 0; j < i*2+1; j++)
            System.out.print("*");

        for (int j = 0; j<(k*2-(i*2+1))/2; j++)
            System.out.print(" ");

        System.out.println();
    }
}