Licensing Library for Java
Validate, Activate, Deactivate, Load, Save Licenses
LICENSE4J is a comprehensive and robust software licensing framework designed to empower developers with
efficient and secure methods for managing application entitlements. At its core, the LICENSE4J Licensing Library
serves as the critical component, providing a powerful API that simplifies the integration of diverse licensing
models directly into Java applications. This library abstracts away the inherent complexities of license
generation, validation, and enforcement, allowing developers to focus primarily on their core business logic
rather than intricate licensing mechanisms.
The library offers unparalleled flexibility by supporting a wide array of licensing models, extending beyond
traditional node-locked and floating schemes. Developers can implement perpetual, time-limited, subscription,
named-user, trial, feature-based, and even USB license dongle models. Crucially, LICENSE4J ensures the integrity
and security of license data through advanced cryptographic encryption and digital signatures utilizing public
key cryptography. This robust protection prevents any unauthorized alteration or tampering on the client side,
safeguarding the authenticity and reliability of license information.
Furthermore, the LICENSE4J Licensing Library provides sophisticated capabilities for hardware fingerprinting,
enabling precise device identification across various environments, including physical machines, virtualized
systems, cloud instances, and containers. Developers also gain the flexibility to define and integrate custom
license features, allowing for highly granular control over software functionality based on specific license
entitlements. With comprehensive methods for secure license storage and retrieval, LICENSE4J offers a complete,
developer-friendly solution for implementing resilient and adaptable software licensing within Java
applications.
The licensing library is available on 