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{{about|the Java Virtual Machine|the Bulgarian band|Kaffe (band)}}
{{about|the Java Virtual Machine|the Bulgarian band|Kaffe (band)}}{{Multiple issues|
{{update|date=September 2011}}
{{Unbalanced|date=July 2024}}
{{Advertising|date=July 2024}}
{{update|date=July 2024}}
}}
{{Infobox software
{{Infobox software
| name = Kaffe
| name = Kaffe
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| screenshot =
| screenshot =
| caption =
| caption =
| developer =
| author = {{ubl|Tim Wilkinson|Peter Mehlitz}}
| developer = Transvirtual Technologies
| latest release version = 1.1.9
| latest release date = {{Start date and age|2008|2|26}}
| released = {{Start date and age|1996}}
| discontinued = yes
| latest preview version =
| latest release version = {{wikidata|property|preferred|references|edit|Q1721044|P348|P548=Q2804309}}
| latest preview date =
| latest release date = {{wikidata|qualifier|preferred|single|Q1721044|P348|P548=Q2804309|P577}}
| latest preview version = {{wikidata|property|preferred|references|edit|Q1721044|P348|P548=Q51930650}}
| latest preview date = {{wikidata|qualifier|preferred|single|Q1721044|P348|P548=Q51930650|P577}}
| operating system = [[Unix-like]]
| operating system = [[Unix-like]]
| programming language = [[C (programming language)|C]] and [[Java (programming language)|Java]]
| programming language = [[C (programming language)|C]] and [[Java (programming language)|Java]]
| genre = [[Java Virtual Machine]]
| genre = [[Java Virtual Machine]]
| license = [[GNU General Public License]]
| license = [[GNU General Public License|GPL-2.0-only]]
| website = {{URL|www.kaffe.org}}
| website = {{URL|www.kaffe.org}}
}}
}}
'''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 [[Programming tool|tool]]s needed to provide a [[Java platform|Java]] runtime environment. Like most other Free Java virtual machines, Kaffe uses [[GNU Classpath]] as its [[Java Class Library|class library]].
'''Kaffe''' is a discontinued "[[clean room design]]" ([[reverse engineering]]) version of a [[Java Virtual Machine]]. It comes with a subset of the [[Java Platform, Standard Edition]] (Java SE), [[Java API]], and [[Programming tool|tool]]s needed to provide a [[Java platform|Java]] runtime environment. Like most other Free Java [[Virtual machine|virtual machines]], Kaffe uses [[GNU Classpath]] as its [[Java Class Library|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 irc.freenode.net.
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]].


Kaffe is a lean and portable [[virtual machine]], although it is significantly slower than commercial implementations.<ref>[http://www.shudo.net/jit/perf/ Performance Comparison of Java/.NET Runtimes (Oct 2004)<!-- Bot generated title -->]</ref> 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]] [[programmer|developers]]. It comes with [[just-in-time compilation|just-in-time]] [[compilers]] for many of the [[CPU architecture]]s, and has been [[porting|port]]ed to more than 70 [[system platform]]s in total. It runs on devices ranging from [[embedded system|embedded]] [[SuperH]] devices to [[IBM zSeries]] [[mainframe computer]]s, and it will even run on a [[PlayStation 2]].
Kaffe is a lean and portable [[virtual machine]], although it is significantly slower than commercial implementations.<ref>[http://www.shudo.net/jit/perf/ Performance Comparison of Java/.NET Runtimes (Oct 2004)<!-- Bot generated title -->]</ref> When compared to the reference implementation of the Java Virtual Machine written by [[Sun Microsystems]], Kaffe was significantly smaller; it thus appeals to [[embedded system]] [[programmer|developers]].{{Unbalanced opinion|date=July 2024}} It comes with [[just-in-time compilation|just-in-time]] [[compilers]] for many of the [[CPU architecture]]s, and has been [[porting|port]]ed to more than 70 [[system platform]]s in total. It runs on devices ranging from [[embedded system|embedded]] [[SuperH]] devices to [[IBM zSeries]] [[mainframe computer]]s, 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.<ref>http://www.mail-archive.com/kaffe@kaffe.org/msg13209.html</ref> 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.
Unlike other implementations, in the past Kaffe used [[GNU Multi-Precision Library]] (GMP) to support arbitrary precision arithmetic. This feature has been removed from release 1.1.9, causing protests from people that claim they used Kaffe for the sole reason of GMP arithmetic being faster than the typical pure java implementation, available in other distributions.<ref>{{cite web | url=http://www.mail-archive.com/kaffe@kaffe.org/msg13209.html | title=FWD: &#91;kaffe&#93; Removed GMP math? }}</ref>{{Unreliable source?|date=July 2024}} 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==
==See also==
{{Portal|Free software|Java}}
{{Portal|Free and open-source software|Computer programming}}


*[[List of Java virtual machines]]
*[[List of Java virtual machines]]
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==References==
==References==
{{reflist}}
<references/>


==External links==
==External links==
*[http://www.kaffe.org/ Kaffe homepage]
*{{Official website|www.kaffe.org}}
*[https://github.com/kaffe/kaffe Moved Kaffe homepage, activity level unclear]
*[http://www.linuxjournal.com/article/3482 Transvirtual Adopts Microsoft Java Extensions, October 1st, 1999 by Craig Knudsen]
*[http://www.linuxjournal.com/article/3482 Transvirtual Adopts Microsoft Java Extensions, October 1st, 1999 by Craig Knudsen]
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{{Java Virtual Machine}}
{{Java (Sun)}}


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{{Java Virtual Machine}}
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[[Category:Java virtual machine]]
{{Java (software platform)}}{{Software-stub}}
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[[Category:Free compilers and interpreters]]
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[[Category:Discontinued Java virtual machines]]
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[[Category:Free and open source interpreters]]

Latest revision as of 16:03, 6 November 2024

This article is about the Java Virtual Machine. For the Bulgarian band, see Kaffe (band).
Kaffe
Original author(s)
  • Tim Wilkinson
  • Peter Mehlitz
Developer(s)Transvirtual Technologies
Initial release1996; 28 years ago (1996)
Final release
1.1.9[1] Edit this on Wikidata / 22 February 2008
Preview release
1.1.10-pre[2] Edit this on Wikidata / 22 August 2011
Repository
Written inC and Java
Operating systemUnix-like
TypeJava Virtual Machine
LicenseGPL-2.0-only
Websitewww.kaffe.org

Kaffe is a discontinued "clean room design" (reverse engineering) version 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.

Kaffe is a lean and portable virtual machine, although it is significantly slower than commercial implementations.[3] When compared to the reference implementation of the Java Virtual Machine written by Sun Microsystems, Kaffe was significantly smaller; it thus appeals to embedded system developers.[unbalanced opinion?] 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 arithmetic. This feature has been removed from release 1.1.9, causing protests from people that claim they used Kaffe for the sole reason of GMP arithmetic being faster than the typical pure java implementation, available in other distributions.[4][unreliable source?] 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

[edit]

References

[edit]
  1. ^ "Release_1_1_9: updated docs for 1.1.9".
  2. ^ "README: Kaffe 1.1.10-pre".
  3. ^ Performance Comparison of Java/.NET Runtimes (Oct 2004)
  4. ^ "FWD: [kaffe] Removed GMP math?".
[edit]
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