Installing JavaThemis for desktop development # JavaThemis is available in the Maven Central repository. Additionally, Themis JNI library has to be installed in your system as well. Themis JNI library is available as a system package for Linux and macOS. Usually you want to install the stable package to benefit from automatic dependency management and security updates. However, you can also build and install the latest version of JNI library from the source code as well.