| Developer(s) | Excelsior LLC |
|---|---|
| Initial release | 2000 |
| Final release | 15.3
/ November 22, 2018 |
| Written in | Modula-2, Oberon-2, Java, Scala, C++, Assembly |
| Operating system | Windows, macOS, and Linux |
| Platform | IA-32, AMD64 and ARM |
| Type | Ahead-of-time (AOT) native code compiler, runtime, and deployment toolkit for Java applications |
| License | EULA |
| Website | www |
Excelsior JET is a now-defunct proprietary Java SE technology implementation built around an ahead-of-time (AOT) Java to native code compiler. The compiler transforms the portable Java bytecode into optimized executables for the desired hardware and operating system (OS). Also included are a Java runtime featuring a just-in-time (JIT) compiler for handling classes that were not precompiled for whatever reason (e.g. third-party plugins or dynamic proxies), the complete Java SE API implementation licensed[1] from Oracle, and a toolkit to aid deployment of the optimized applications. Excelsior JET was developed by Excelsior LLC, headquartered in Novosibirsk, Russia.