Xylem And Phloem Number in Java

A xylem number is a number such that the sum of extreme digits equals the sum of the mean digits. Otherwise the number is considered as the phloem number. Write a program in Java to accept a positive integer from the user. Check whether it is a xylem number or a phloem number. Example: INPUT: N = 12348 OUTPUT: Sum of extreme digits = 1 + 8 = 9. Sum of mean digits = 2 + 3 + 4 = 9. Thus, 12348 is a xylem number.

 import java.io.*;

 class Xylem

{

 public static void main(String args[])throws IOException

{

 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

 System.out.print("N = ");

 int num = Math.abs(Integer.parseInt(br.readLine())); 

 int extreme = 0;

 int mean = 0; 

 int copy = num;

 while(copy != 0)

{

 if(copy == num || copy < 10)

 extreme += copy % 10;

 else mean += copy % 10; 

 copy /= 10;

 }

 System.out.println("Sum of extreme digits: " + extreme); 

 System.out.println("Sum of mean digits: " + mean); 

 if(extreme == mean) 

 System.out.println(num + " is a xylem number.");

 else 

 System.out.println(num + " is a phloem number."); 

 }

 }