License4J is designed to be simple, so you can integrate into your software product easily and concentrate on your software development. License validation is performed with a static method found in runtime library; license generation is done easily with License Manager GUI.
Runtime Library Integration page has enough information for license validation in your software. If you need more information on integration and license generation methods you can get user guide document below.
Download package includes JavaDoc documentation which includes all information about classes, parameters and methods.