Pattern Program

/*
 *

Enter an even number : 4

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

 
 */
/*
 * No negative inputs please
 */
/**
 * A quote: there are more than one ways to do it
 */
package javaapplication2;

import java.util.Scanner;

/**
 *
 * @author Umang
 */
public class Main
{
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {

        // loop variables
        int j = 0, k = 0;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter a number : ");

        int n = s.nextInt();


        System.out.print("\n");

        for (j = 0; j < n; j++)
        {

            for (k = 0; k < n; k++)
            {

                if (k == 0 || k == n - 1 || j == 0 || j == n - 1)
                {

                    System.out.print(" * ");
                }
                else
                {
                    System.out.print("   ");
                }
            }

            System.out.print("\n");
        }
    }
}