Editing Free Java implementations (section)

==After the May 2007 code release==
{{See also|OpenJDK}}
{{Update|section|date=January 2014}}

As of May 2008, the only part of the Class library that remains proprietary  (4% as of May 2007 for OpenJDK 7,
<ref name="openJDK_plan">{{cite web
 |url         = http://weblogs.java.net/blog/robogeek/archive/2007/10/openjdk_encumbr.html
 |title       = Plans for OpenJDK
 |last        = Herron
 |first       = David
 |date        = 2007-10-04
 |access-date  = 2007-10-09
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20071011014156/http://weblogs.java.net/blog/robogeek/archive/2007/10/openjdk_encumbr.html
 |archive-date = 2007-10-11
}}
</ref><ref>
{{cite web
| url=http://fitzsim.org/blog/?p=17
| title=Plans for OpenJDK
| last=Fitzsimmons|first=Thomas
| date=2007-05-18
| access-date=2007-05-22}}
</ref>
and less than 1% as of May 2008 in OpenJDK 6<ref name="fedora9la">
{{cite web
 |url         = http://langel.wordpress.com/2008/03/13/openjdk-in-fedora-9/
 |title       = OpenJDK to replace IcedTea in Fedora 9
 |last        = Angel
 |first       = Lillian
 |date        = 2008-03-13
 |access-date  = 2008-04-05
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20080418133611/http://langel.wordpress.com/2008/03/13/openjdk-in-fedora-9/
 |archive-date = 2008-04-18
}}
</ref><ref name="fedora9redhat">{{cite web
| url=http://developer.redhatmagazine.com/2008/03/12/openjdk-to-replace-icedtea-in-fedora-9/
| title=OpenJDK in Fedora 9!
| last=Wade
| first=Karsten
| publisher=redhatmagazine.com
| quote=''Thomas Fitzsimmons updated the Fedora 9 release notes source pages to reflect that Fedora 9 would ship with OpenJDK 6 instead of the IcedTea implementation of OpenJDK 7. Fedora 9 (Sulphur) is due to release in May 2008.''
| date=2008-03-13
| access-date=2008-04-05
| archive-url=https://web.archive.org/web/20080421100346/http://developer.redhatmagazine.com/2008/03/12/openjdk-to-replace-icedtea-in-fedora-9/
| archive-date=2008-04-21
| url-status=dead
}}</ref>)
is the [[Simple Network Management Protocol|SNMP]] implementation.<ref name="openJDK_b10">{{cite web
|url=http://mail.openjdk.java.net/pipermail/jdk6-dev/2008-May/000058.html
|title=OpenJDK 6 b10 source posted
|date=2008-05-30
|access-date=2008-06-01
}}
</ref>

Since the first May 2007 release, [[Sun Microsystems]], with the help of the community, has released as free software (or replaced with free-software alternatives) almost all the encumbered code:

* All the audio engine code, including the [[Musical Instrument Digital Interface|software synthesizer]], has been released as open-source.<ref name="openJDK_b10"/><ref>[http://openjdk.java.net/projects/audio-engine/ audio-engine project page]</ref> The closed-source software synthesizer has been replaced by a new synthesizer developed specifically for OpenJDK called ''Gervill'',<ref>{{cite web
 |url        = https://gervill.dev.java.net/
 |archive-url = https://archive.today/20111004052704/https://gervill.dev.java.net/
 |url-status   = dead
 |archive-date = 2011-10-04
 |title      = Gervill - Software Synthesizer
 |access-date = 2008-06-01
}}</ref>
* All [[cryptography]] classes used in the Class library have been released as free software,<ref>{{cite web
|url=http://mail.openjdk.java.net/pipermail/security-dev/2007-September/000015.html
|title=Crypto has been added to OpenJDK
|date=2007-09-27
|access-date=2007-10-07
}}</ref>
* [[FreeType]] has replaced the code that scales and [[Rasterisation|rasterizes]] [[Computer font|fonts]].<ref>[http://openjdk.java.net/projects/font-scaler/ font-scaler projectpage]</ref><ref name="2dproject">[http://openjdk.java.net/groups/2d/ Java2D project page]
</ref><ref>{{cite web
|url=http://mail.openjdk.java.net/pipermail/font-scaler-dev/2007-August/000011.html
|title=Freetype font rasteriser
|date=2007-08-07
|access-date=2007-11-24
}}</ref>
* [[LittleCMS]] has replaced the native [[color management|color-management]] system.<ref name="2dproject"/> There is a pluggable layer in the JDK, so that the commercial version can use the old color management system and OpenJDK can use LittleCMS.
* The open-sourced Pisces renderer used in the [[phoneME]] project has replaced the [[Spatial anti-aliasing|anti-aliasing]] graphics [[Rasterisation|rasterizer]] code.<ref name="2dproject"/><ref>[https://phoneme.dev.java.net/ phoneme.dev.java.net/] {{webarchive|url=https://web.archive.org/web/20070610234355/https://phoneme.dev.java.net/ |date=2007-06-10 }}
</ref><ref>
[http://openjdk.java.net/projects/graphics-rasterizer/ graphics-rasterizer project page]</ref> This code is fully functional, but still needs some performance enhancements,<ref>{{cite web
| url=http://mail.openjdk.java.net/pipermail/2d-dev/2007-October/000078.html
| title=Open Source rasterizer
| publisher=Sun Microsystems
|last=Graham|first=Jim
| date=2007-10-03
| access-date=2007-05-09}}</ref>
* The [[JavaScript]] plugin has been open-sourced ([[Rhino (JavaScript engine)|the JavaScript engine]] itself was open-sourced from the beginning).<ref>{{cite web
| url=http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=85
| title=Javascript is encumbered and there is no javascript plugin support.
| publisher=[[IcedTea]]
| quote=''Changing Summary. JavaScript is no longer encumbered, but we still need liveconnect support.''
| date=2008-03-11
| access-date=2008-06-01
| archive-date=2008-09-27
| archive-url=https://web.archive.org/web/20080927185957/http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=85
| url-status=dead
}}</ref>

Because of these previously encumbered components, it was not possible to build [[OpenJDK]] only with free software components. In order to be able to do this before the whole [[Java Class Library|class library]] is made free, and to be able to bundle [[OpenJDK]] in  [[Fedora (operating system)|Fedora Core]] and other free [[Linux]] distributions, [[Red Hat]] has started a project called [[IcedTea]]. It is basically an OpenJDK/[[GNU Classpath]] hybrid that can be used to bootstrap OpenJDK using only free software.<ref>{{cite web
| url=http://article.gmane.org/gmane.comp.java.openjdk.distro-packaging.devel/5
| archive-url=https://web.archive.org/web/20080211190907/http://article.gmane.org/gmane.comp.java.openjdk.distro-packaging.devel/5
| url-status=dead
| archive-date=2008-02-11
| title=Experimental Build Repository at icedtea.classpath.org
| date=2007-06-07
|last=Andrew|first=Haley
| access-date=2007-06-09}}</ref><ref>{{cite web
| url=http://developer.classpath.org/pipermail/classpath/2007-June/002109.html
| title=Experimental Build Repository at icedtea.classpath.org
| first=Mark
| last=Wielaard
| date=2007-06-07
| access-date=2007-06-09
| archive-date=2007-06-19
| archive-url=https://web.archive.org/web/20070619012918/http://developer.classpath.org/pipermail/classpath/2007-June/002109.html
| url-status=dead
}}</ref>

As of March 2008, the [[Fedora (operating system)|Fedora 9]] distribution has been released with OpenJDK 6 instead of the IcedTea implementation of OpenJDK 7.<ref name="fedora9redhat" /> Some of the stated reasons for this change are:

* Sun has replaced most of the encumbrances for which IcedTea was providing replacements (less than 1% of encumbered code remains in the [[Java Class Library|class library]], and this code is not necessary to run OpenJDK).
* OpenJDK 6 was a stable branch, whereas OpenJDK 7 was unstable and not expected to ship a stable release until 2009.
* Sun has licensed the OpenJDK trademark for use in Fedora.{{citation needed|reason=non-primary|date=December 2011}}

In June 2008, it was announced that [[IcedTea]] 6 (as the packaged version of OpenJDK on [[Fedora (operating system)|Fedora 9]]) had passed the [[Technology Compatibility Kit]] tests and can claim to be a fully compatible Java 6 implementation.<ref>{{cite web
 |url         = http://blog.softwhere.org/archives/196
 |title       = Java is finally Free and Open
 |date        = 2008-06-19
 |last        = Sharples
 |first       = Rich
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20080620065024/http://blog.softwhere.org/archives/196
 |archive-date = 2008-06-20
}}
</ref>{{citation needed|reason=non-primary|date=December 2011}}

In September 2013, Azul Systems released Zulu, a free, open source build of [[OpenJDK]] for [[Windows Server]] and the [[Microsoft Azure]] Cloud. Later releases added support for [[Mac OS X]], multiple versions of [[Linux]] and the [[Java Platform, Standard Edition]]  version 8. Zulu is certified compliant with Java SE 8, 7 and 6 using the OpenJDK Community [[Technology Compatibility Kit]].<ref>{{Cite web|url=http://www.azulsystems.com/products/zulu|title = Core}}</ref>

[[Amazon (company)|Amazon]] have released [[Amazon Corretto]] a  no-cost, multiplatform, production-ready distribution of the Open Java Development Kit. It is released under [[GPL]] v2 with the [[GPL linking exception#The classpath exception|Classpath Exception]]. Long-term support versions of Java 8 and Java 11 are available. It was first publicly released on January 31, 2019.<ref>{{cite web|access-date=2019-07-25|title=Amazon Corretto 8 Now Generally Available|url=https://aws.amazon.com/blogs/opensource/amazon-corretto-8-generally-available/|date=January 31, 2019|website=Amazon Web Services|author=Arun Gupta}}</ref>

In 2017, the [[Eclipse Foundation]] released AdoptOpenJDK, now named [[Adoptium]], whose main goal is "to promote and support [[free and open-source]] high-quality runtimes and associated technology for use across the [[Java (programming language)|Java]] ecosystem."