Java-String

Given a string, s , matching the regular expression [A-Za-z !,?._'@]+, split the string into tokens.

Given a string, , 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.

Input Format A single string, s

s is composed of any of the following: English alphabetic letters, blank spaces, exclamation points (!), commas (,), question marks (?), periods (.), underscores (_), apostrophes ('), and at symbols (@).

Solution

import java.io.; import java.util.;

public class Solution {

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String s = scan.nextLine();
    s=s.trim();
    if(s.length()>0)
    {
    String [] a=s.split("[ !,?._'@]+");
   System.out.println(a.length);
    for(String retval : a)
    System.out.println(retval);
    }
    else
        System.out.println("0");
    
    // Write your code here.
    scan.close();
}

}