Question

Develop a complete java program that produces a square pattern of asterisks and spaces. First prompt the user for the size of the pattern, then use for loops to print out the pattern. If the user enters a value that is not a number your program's behavior is arbitrary. For non-positive values your program should print nothing and end normally. Your program should work for input values up to the width of the terminal window. Examples for the first 6 values are shown below.

Everytime i do the code i get full boxes. I can't seem to figure out how to make them hollow. Question is how is the program supposed to look.

Input:	1	2	3	4	5	6
Output:	*	** **	*** * * ***	**** * * * * ****	***** * * * * * * *****	****** * * * * * * * * ******

Answer 1

import java.util.Scanner;

public class AsterisksBox {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        for(int i = 0; i < n; ++i) {
            for(int j = 0; j < n; ++j) {
                if(i == 0 || j == 0 || i == n-1 || j == n-1) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }

}