Printing middle number of a string

 import java.util.Scanner;

public class PrintMiddle {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.print("Input a string: ");

String str = sc.nextLine();

System.out.print("The middle character of the string: " + middle(str) + "\n");

}

public static String middle(String str) {

int position;

int length;

if (str.length() % 2 == 0) {

position = str.length() / 2 - 1;

length = 2;

} else {

position = str.length() / 2;

length = 1;

}

return str.substring(position, position + length);

}

}