Java Code Example: hourglass pattern

This Java program outputs a pattern in Hourglass shape on the screen. Two nested for loops are needed for this

class HourglassPatternExample {
    public static void main(String[] args) {
        int i, j, k, n = 8;

        for (i = 1; i <= n; i++) {
            for (j = 1; j < i; j++) {
                System.out.print(' ');
            }

            for (k = i; k <= n; k++) {
                System.out.print("* ");
            }
            System.out.println();
        }
        for (i = n - 1; i >= 1; i--) {
            for (j = 1; j < i; j++) {
                System.out.print(' ');
            }
            for (k = i; k <= n; k++) {
                System.out.print("* ");
            }

            System.out.println();
        }
    }
}

Output

* * * * * * * * 
 * * * * * * * 
  * * * * * * 
   * * * * * 
    * * * * 
     * * * 
      * * 
       * 
      * * 
     * * * 
    * * * * 
   * * * * * 
  * * * * * * 
 * * * * * * * 
* * * * * * * *