program to calculate product of each column in matrix

Write a java program to print following pattern 

import java.util.Scanner;

public class StarPattern12 {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

System.out.println("Enter Size: ");

int n=sc.nextInt();

for (int i = 0; i < n; i++) {

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

if(i==0 ||  i==n-1 || i==j || i==n-j-1 )

System.out.print("* ");

else

System.out.print("  ");

}

System.out.println();

}

}

}