Print a hollow rectangle star with the help of nested loop

import java.util.Scanner;

/**
 * Link4
 */
public class Link {

    public static void main(String[] args) {
        Scanner sc =  new Scanner(System.in);
        System.out.println("enter a number");
        int n = sc.nextInt();
        System.out.println("enter a number");
        int m = sc.nextInt();
        for (int i = 1; i <= n; i++) {  //for outer loops , rows
            for (int j = 1; j <=m; j++) { // for inner loops , columns
                if(i==1 || j==1 || i==n|| j==m){
                    System.out.print("*");
                }
                else{
                    System.out.print( " ");
                }

            }
            System.out.println(); 


        }
    }
}