DScoder

public class Square {

  public static void main(String[] args){

		int sizeFig = 9; //Write your own size

		for(int i=0; i < sizeFig; i++) {	
		for(int k = 0; k < sizeFig; k++) {
			if( k == 0 || k == sizeFig - 1 || i == 0 || i == sizeFig - 1 )
				System.out.print("* ");