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."); 
 }
 }

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