World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0000401348
Reproduction Date:

Title: Kaffe  
Author: World Heritage Encyclopedia
Language: English
Subject: Java virtual machine, GNU Classpath, Java/Selected article, GNU Compiler for Java, Eurovision Song Contest 2005
Collection: Free Compilers and Interpreters, Java Virtual MacHine
Publisher: World Heritage Encyclopedia


Stable release 1.1.9 / February 26, 2008 (2008-02-26)
Written in C and Java
Operating system Unix-like
Type Java Virtual Machine
License GNU General Public License
Website .org.kaffewww

Kaffe is a clean room design of a Java Virtual Machine. It comes with a subset of the Java Platform, Standard Edition (Java SE), Java API, and tools needed to provide a Java runtime environment. Like most other Free Java virtual machines, Kaffe uses GNU Classpath as its class library.

Kaffe, first released in 1996, was the original open-source Java implementation. Initially developed as part of another project, it grew so popular that developers Tim Wilkinson and Peter Mehlitz founded Transvirtual Technologies, Inc. with Kaffe as the company's flagship product. In July 1998, Transvirtual released Kaffe OpenVM under a GNU General Public License. Now it is developed by a world-wide team of programmers. Beside the mailing list, the developers can often be reached via IRC in the #kaffe channel on

Kaffe is a lean and portable virtual machine, although it is significantly slower than commercial implementations.[1] When compared to the reference implementation of the Java Virtual Machine written by Sun Microsystems, Kaffe is significantly smaller; it thus appeals to embedded system developers. It comes with just-in-time compilers for many of the CPU architectures, and has been ported to more than 70 system platforms in total. It runs on devices ranging from embedded SuperH devices to IBM zSeries mainframe computers, and it will even run on a PlayStation 2.

Unlike other implementations, in the past Kaffe used GNU Multi-Precision Library (GMP) to support arbitrary precision arithmetics. This feature has been removed from release 1.1.9, causing protests from people that claim they used Kaffe for the sole reason GMP arithmetic being faster than the typical pure java implementation, available in other distributions.[2] The capability was removed to reduce the maintenance work, expecting that interested people will integrate GMP support into GNU Classpath or OpenJDK. Subsequently GNU Classpath introduced GMP support in version 0.98.

See also


  1. ^ Performance Comparison of Java/.NET Runtimes (Oct 2004)
  2. ^

External links

  • Kaffe homepage
  • Moved Kaffe homepage, activity level unclear
  • Transvirtual Adopts Microsoft Java Extensions, October 1st, 1999 by Craig Knudsen
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.