Answers to questions

Answer to question 1: For this, you can invoke the saveModel() method by providing the input model filename:

String FILENAME = Constants.FILENAME;
// Save the trained FM model 
fmlsgd.saveModel(FILENAME);

The saveModel() method goes as follows:

public void saveModel(String FILENAME) throws Exception
    {
        FILENAME = Constants.FILENAME;
        FileOutputStream fos = null;
        DataOutputStream dos = null;        
        try {      
            fos = new FileOutputStream(FILENAME);
            dos = new DataOutputStream(fos);
            dos.writeBoolean(fm.k0);
            dos.writeBoolean(fm.k1);
            dos.writeDouble(fm.w0);
            dos.writeInt(fm.num_factor);
            dos.writeInt(fm.num_attribute);
            dos.writeInt(task.ordinal());
            dos.writeDouble(max_target);
            dos.writeDouble(min_target);
            
           ...