HackerRank: Java String Tokens

Given a string, S, matching the regular expression [A-Za-z !,?._'@]+, split the string into tokens. We define a token to be one or more consecutive English alphabetic letters. Then, print the number of tokens, followed by each token on a new line.

Note: You may find the String.split method helpful in completing this challenge.

Sample Input

He is a very very good boy, isn't he?

Sample Output

10

He

is

a

very

very

good

boy

isn

t

he 

Java Code:

import java.util.*;

public class javaStringTokens {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

        String s = scan.nextLine();

        String a[] = s.trim().split("[^a-zA-Z]+");

        if(s.trim().length()==0)

        System.out.println(0);

        else

        {

            System.out.println(a.length);

            for(String i:a)

            {

                System.out.println(i);

            }

        }

        scan.close();

    }

}