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); for(int i=0;i<fm.num_attribute;i++) ...
