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IKVM.NET is an implementation of Java for Mono and the Microsoft .NET Framework. IKVM is free software, distributed under a permissive free software licence.[1]

Developer(s)original Jeroen Frijters, now Windward Studios
Stable release
8.5[1] / April 25, 2019 (2019-04-25)
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Written inJava and C#
Operating systemCross-platform
TypeJava Virtual Machine, Java bytecode compiler and Java Library
Licensezlib License

The original developer, Jeroen Frijters discontinued work on IKVM in 2015.[2]

In 2018, Windward Studios forked IKVM.Net to continue development on the open-sourced IKVM.[3]

IKVM.NET includes the following components:

With IKVM.NET you can run compiled Java code (bytecode) directly on Microsoft .NET or Mono. The bytecode is converted on the fly to CIL and executed.

This is in contrast to J#. J# is a Java syntax on the .NET framework, whereas IKVM.NET is effectively a Java framework running on top of .NET's framework.

Jeroen Frijters was the main contributor to IKVM.NET. He is Technical Director of Sumatra Software, based in the Netherlands.[4]



The "IKVM" portion of the name is a play on "JVM" in which the author "just took the two letters adjacent to the J".[5]


As of June 2007, the machine supports Java 1.6. AWT and Swing are partially supported. IKVM uses OpenJDK as its class library.[6]

IKVM has very limited support for Abstract Window Toolkit (AWT). For this reason, it cannot run ImageJ and other apps that depend on AWT. Implementing AWT in IKVM.NET is a low priority.[7][8]

See alsoEdit


  1. ^ "IKVM". Retrieved 2019-05-03.
  2. ^ "The End of IKVM.NET". Retrieved 2017-07-22.
  3. ^ "IKVM is alive & well".
  4. ^ "Sumatra Software b.v." Retrieved 2014-04-30.
  5. ^ "osdir mailing list archive for java.ikvm.devel". Archived from the original on 2012-12-27. Retrieved 2012-10-09.
  6. ^ "IKVM.NET Home Page". Retrieved 2008-07-16.
  7. ^ "IKVM.NET developers' blog". Retrieved 2013-03-18.
  8. ^ "IKVM.NET Users' Guide". Retrieved 2013-03-18.

External linksEdit