Java String Tokens

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().trim();
     String[] array = s.split("[ !,?._'@]+");
    if(s.length() == 0)
        System.out.println("0");
    else
        System.out.println(array.length);
    for(String i: array){
        System.out.println(i);
    }
        scan.close();
    }
}