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{{Use dmy dates|date=December 2023}}
'''Blackdown Java''' was a [[Linux]] [[porting|port]] of [[Sun Microsystems]]'s [[Java virtual machine]], developed by a group of volunteers led by Juergen Kreileder, Steve Byrne, and Karl Asha, and
| title = Java Linux Contact Information
| url = http://www.blackdown.org/java-linux/java-linux-contact.html
| accessdate = 2009-06-15
| archiveurl =
| archivedate
| title = Java-Linux Latest Information
| url = http://www.blackdown.org/java-linux/Information.html
| accessdate = 2012-01-16
| archiveurl =
| archivedate = 1996-10-19
}}</ref> predating Sun's official Linux port.
Blackdown Java supported Linux on [[Instruction set|architectures]] that the official version did not, including [[SPARC]] and [[PowerPC]].<ref>{{cite web
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| url = http://www.blackdown.org/java-linux/java2-status/jdk1.3-status.html
| accessdate = 2009-06-15
| archiveurl =
| archivedate =
| url-status = dead
}}</ref> The Blackdown project ended in August 2007, after Sun released an open source version of the [[HotSpot]] JVM as part of [[OpenJDK]]; OpenJDK is available under the free [[GNU General Public License]].<ref>{{cite web▼
|
▲ }}</ref> The Blackdown project ended in August 2007, after Sun released an open source version of the [[HotSpot (virtual machine)|HotSpot]] JVM as part of [[OpenJDK]]; OpenJDK is available under the free [[GNU General Public License]].<ref>{{cite web
|last = Malinovich
| title = Blackdown Java Retires▼
|first = Alex
| url = http://www.the-love-shack.net/2007/08/30/blackdown-java-retires/▼
|accessdate = 2009-06-15
|archive-url = https://web.archive.org/web/20090107065800/http://www.the-love-shack.net/2007/08/30/blackdown-java-retires/
|archive-date = 7 January 2009
|url-status = dead
|df = dmy-all
}}</ref><ref>{{cite web
| title = Java Linux Homepage
| url = http://www.blackdown.org/
| accessdate = 2009-06-15
| archiveurl =
| archivedate = 2007-09-12
}}</ref><ref>{{ cite web
| url= http://mail.openjdk.java.net/pipermail/announce/2007-May.txt | title = Open JDK is here!
| publisher=Sun Microsystems
| date =
| accessdate=9 May
At its close, Blackdown supported J2SE versions 1.4.2 on i386 and AMD64, 1.4.1 on SPARC, and 1.3.1 on PowerPC.<ref>{{cite web
| title = Java Platform 2 for Linux: Status and Information
| url = http://www.blackdown.org/java-linux/java2-status/index.html
| accessdate = 2009-06-15
| archiveurl =
| archivedate = 9 August 2007
| url-status = dead
}}</ref><ref>{{cite web▼
| df = dmy-all
▲ }}</ref><ref>{{cite web
| title = Java 2 SE 1.4.2-03 Release Notes
| url = http://www.blackdown.org/java-linux/java2-status/README-142-03
| accessdate = 2009-06-15
| archiveurl =
| archivedate = 7 August 2007
| url-status = dead
}}</ref><ref>{{cite web▼
| df = dmy-all
▲ }}</ref><ref>{{cite web
| title = Java Platform 2 Version 1.3.x for Linux
| url = http://www.blackdown.org/java-linux/java2-status/jdk1.3-status.html
| accessdate = 2009-06-15
| archiveurl =
| archivedate =
| url-status = dead
}}</ref> Work on J2SE 1.5.x support for x86, AMD64, SPARC, and PowerPC had been announced, but was never released.<ref>{{cite web▼
| df = dmy-all
▲ }}</ref> Work on J2SE 1.5.x support for x86, AMD64, SPARC, and PowerPC had been announced, but was never released.<ref>{{cite web
| title = Java Platform 2 Version 1.5.x for Linux
| url = http://www.blackdown.org/java-linux/java2-status/j2se1.5-status.html
| accessdate = 2009-06-15
| archiveurl =
| archivedate =
| url-status = dead
}}</ref>▼
| df = dmy-all
▲ }}</ref>
In
| title = PRNewswire: Inprise Collaborates With Sun...on...Java(TM) 2 Platform For...Linux...
| url = http://www.linuxtoday.com/news_story.php3?ltsn=1999-12-07-047-04-PR
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|date = 1999-12-08
}}</ref> Sun publicly apologized to the Blackdown developers.<ref>{{cite news
| last1 = Orenstein | first1 = David
| url = https://www.computerworld.com/home/news.nsf/all/9912083sunlinux
| title = Sun apologizes to developers of Java on Linux
| work = [[Computerworld]]
| archiveurl = https://web.archive.org/web/20001208114600/https://www.computerworld.com/home/news.nsf/all/9912083sunlinux <!-- see also http://transcripts.cnn.com/1999/TECH/computing/12/10/sun.apology.idg/index.html where date and lead paragraph are different -->
| archivedate = 2000-12-08
▲ | date=1999-12-09
}}</ref> The incident revealed that there were long standing problems between Sun and Blackdown.
Despite widespread confusion, Blackdown was neither [[free software]] nor [[open-source software]]; this was due to licensing restrictions from Sun Microsystems. Its binary redistribution policy allowed it to be pre-installed or included with many [[Linux distributions]] (e.g., [[Gentoo Linux]]){{
The Blackdown team pioneered Sun's involvement with external, volunteer efforts. Steve Byrne, who was working at Sun at the time, worked with Sun legal to establish an agreement to license the Java test suite for a few Blackdown participants at no cost, and this was used to certify the Blackdown Java implementation as being 100% Java compatible.
The Blackdown team received recognition at the JavaOne conference in 1998 for the work that the team had been doing.
==Notes==
{{Reflist}}
{{Java (Sun)}}
[[Category:Discontinued Java virtual machines]]
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