API Java for persistence of system settings in files, that can be recorded in the format Properties or XML, implements cryptography to protect data that will be recorded, has a graphical interface for encrypting and decrypting using one key.
Various listener types.If file is changed, property present in file gets changed, to see the changes and use these changed values in your running applications.This Java API allows you to use listeners like PropertyChangeListener, FileChangeListener, etc.
A basic java IRC API
A Variable Length Quantity streamer. Read and writes various data types in this format. A VLQ Stream stores/reads data using a variable length which might lead to a more compact storage. This library contains both input and output streams.