How do I implement Word2Vec in Java?

What is stopping you from saving a word2vec file (C program) in text format and then reading the file with a chunk of Java code and loading the vectors into a hash file entered with a string of words?

Some code snippets:

// Class to store a hashmap of wordvecs
public class WordVecs {

    HashMap<String, WordVec> wordvecmap;
    ....
    void loadFromTextFile() {
        String wordvecFile = prop.getProperty("wordvecs.vecfile");
        wordvecmap = new HashMap();
        try (FileReader fr = new FileReader(wordvecFile);
            BufferedReader br = new BufferedReader(fr)) {
            String line;

            while ((line = br.readLine()) != null) {
                WordVec wv = new WordVec(line);
                wordvecmap.put(wv.word, wv);
            }
        }
        catch (Exception ex) { ex.printStackTrace(); }        
    }
    ....
}

// class for each wordvec
public class WordVec implements Comparable<WordVec> {
    public WordVec(String line) {
        String[] tokens = line.split("\\s+");
        word = tokens[0];
        vec = new float[tokens.length-1];
        for (int i = 1; i < tokens.length; i++)
            vec[i-1] = Float.parseFloat(tokens[i]);
        norm = getNorm();
    }
    ....
}

      

        
        
        
      

    

If you want to get the nearest neighbors for a given word, you can store a list of N nearest precalculated neighbors associated with each WordVec object.