The desktop installers include a Java runtime (OpenJDK). It is Eclipse Temurin from the Eclipse Adoptium project: Java 25 on Windows, macOS and Linux (Temurin 25.0.4.1+1 in the 2.2.41, 2.2.42 and 2.2.44 Windows, macOS and Linux installers), and in the 2.2.33 installers Temurin 21.0.12.1+1 on Windows and macOS, with Ubuntu's OpenJDK package (openjdk-21 21.0.12.1+1-1~26.04.4) in the 2.2.33 Linux .deb. Setliner does not change the OpenJDK source; the build reduces the runtime with jlink to the modules Setliner uses (with --strip-debug, --no-header-files, --no-man-pages and --strip-native-commands), and may add a class-data-sharing archive generated by the runtime itself. It is licensed under the GNU General Public License, version 2, with the Classpath Exception; the Classpath Exception means Setliner's own code, which only runs on it, is not covered by the GPL. The runtime's licence and notice files are installed with it, in its legal folder. The Windows runtime also contains Microsoft's Visual C++ runtime libraries (vcruntime140, msvcp140, ucrtbase and the api-ms-win DLLs), redistributed as Eclipse Temurin ships them.

Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates. Eclipse Temurin and Eclipse Adoptium are trademarks of the Eclipse Foundation. Setliner is not affiliated with or endorsed by any of them.

The complete corresponding source code of the runtime in each installer we publish, with its version and sha256, and the build files that control how it is put together, is at https://setliner.com/source/, next to the installers. For at least three years after we last distribute any Setliner installer, including earlier versions, we will also give anyone who asks a complete machine-readable copy of the corresponding source of the GPL and MS-RL components in it, on a medium customarily used for software interchange, for no more than our cost of physically sending it: write to support@setliner.com and name the installer and its version.