How to count the number of occurrences of each word?

Question

If I have an article in English, or a novel in English, and I want to count how many times each words appears, what is the fastest algorithm written in Java?

Some pe

Answer 1

    Map countByWords = new HashMap();
    Scanner s = new Scanner(new File("your_file_path"));
    while (s.hasNext()) {
        String next = s.next();
        Integer count = countByWords.get(next);
        if (count != null) {
            countByWords.put(next, count + 1);
        } else {
            countByWords.put(next, 1);
        }
    }
    s.close();

this count "I'm" as only one word