public static void main(final String[] args) { for (int i = -7; i <= 7; i += 2) { if (i == -1) continue; for (int k = 0; k < (7 - Math.abs(i)) / 2; ++k) System.out.print(" "); for (int j = 0; j < Math.abs(i); ++j) System.out.print("*"); System.out.printf("%n"); } }