Hackerrank -String - String Token

[biryu2205]

import java.util.Scanner;

class Solution {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String[] str = sc.nextLine().trim().split("[ !,?\\._'@]+", 0);
    if (str.length == 1 && str[0].equals("")) {
      System.out.println(0);
    } else {
      System.out.println(str.length);
      for (String s : str) System.out.println(s);
    }
  }
}