License4J Java licensing library 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 licensing runtime library; license generation is done easily either with License Manager GUI or licensing development library
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 documents below.
Download package includes JavaDoc documentation which includes all information about classes, parameters and methods.
License4J License Manager User Guide
License4J Floating License Server User Guide
License4J Auto License Generation and Activation Server User Guide
License Activation and Validation Proxy Server User Guide