WordCounter.java

package com.serenitydojo.exceptions;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.Paths;

public class WordCounter {
    public int numberOfWordsIn(String value){
        if(value==null){
            return 0;
        }
        return value.split("\\W").length;


    }

    public int numberOfWordsInAfile(String fileName) throws IOException {
        try {
            String fileContents = Files.readString(Paths.get(fileName));
            int wordCount = numberOfWordsIn(fileContents);
            if(wordCount==0){
                throw new FileHasNoWordException("no words found in a file " + fileName);
            }
            return wordCount;
        }
        catch(NoSuchFileException noSuchFile){
            throw new FileHasNoWordException("no words found in a non existing file " + fileName);

        }

    }
}