Java String Tokens | HackerRank Solution

Hello coders, today we are going to solve Java String Tokens HackerRank Solution.

Problem

Given a string, n, matching the regular expression [A-Z, a-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.

Constraints

• 1 <= length of s <= 4.10⁵
• s is composed of any of the following: English alphabetic letters, blank spaces, exclamation points (!), commas (,), question marks (?), periods (.), underscores (_), apostrophes (‘), and at symbols (@).

Output Format

On the first line, print an integer, n, denoting the number of tokens in string s(they do not need to be unique). Next, print each of the n tokens on a new line in the same order as they appear in input string s.

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

Explanation

We consider a token to be a contiguous segment of alphabetic characters. There are a total of 10 such tokens in string s, and each token is printed in the same order in which it appears in string s.

Solution – 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();
        scan.close();

        // Write your code here.
        s = s.trim();
        if (s.length() == 0) {
            System.out.println(0);
        } else {
            String[] strings = s.split("['!?,._@ ]+");
            System.out.println(strings.length);
            for (String str : strings)
                System.out.println(str);
        }
    }
}

Disclaimer: The above Problem ( Java String Tokens ) is generated by Hacker Rank but the Solution is Provided by CodingBroz. This tutorial is only for Educational and Learning Purpose.