Question

How to use regex to extract and count words from a string in Java

Answer 1

import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.util.ArrayList;
import java.util.List;

public class UseRegexToExtractAndCountWordsFromAString_Java {
    public static void main(String[] args) {
        final String s = "c++ python php java";

        Pattern words = Pattern.compile("[^\\s]+");
        Matcher matcher = words.matcher(s);

        List<String> wordList = new ArrayList<>();
        while (matcher.find()) {
            wordList.add(matcher.group());
        }

        System.out.println("Total words = " + wordList.size());
        
        System.out.println("\nWords list:");
        for (String word : wordList) {
            System.out.println(word);
        }
    }
}


   
/*
run:
   
Total words = 4

Words list:
c++
python
php
java
   
*/

 

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