public static void main(String[] args) {

//Pattern programming-2 (Hollow rectangle)

int n = 4;

int m = 5;

//outer loop for rows

for (int i = 1; i <= n; i++) {

//inner loop for columns

for (int j = 1; j <= m; j++) {

//check if it is first row or last row or first column or last column

if (i == 1 || j == 1 || i == n || j == m) {

System.out.print("*");

} else {

System.out.print(" ");

}

}

System.out.println();

}

}