OpenJDK availability for Windows OS

Question

Is there any OpenJDK version available to Windows OS  From the OpenJDK home page  http   openjdk java net   it redirects to Oracle Sun JRE for Windows machine   Is there any existing OpenJDK available to Windows  If yes  where to get it  If not  do we have to build it by ourselves  see http   blogs oracle com poonam entry building openjdk on windows

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I recently came across this site  https   adoptopenjdk net   Seems reliable to me  Haven t tried myself but surely will give it a try   License      License s    Build scripts and other code to produce the binaries  the website and other build infrastructure are licensed under Apache License  Version 2 0  OpenJDK code itself is licensed under GPL v2 with Classpath Exception    EDIT  I was also delighted to learn that AdoptOpenJDK MSI installer  JDK and JRE  now comes with IcedTeaWeb  which is a replacement for Oracle WebStart - simple installer with almost  next-next-next-finish  and the JWS applications works like they used to

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OpenSCG maintains OpenJDK 6 installers for 32-bit Windows and other operating systems   To configure it  create a JAVA HOME environment variable and set it to C  OpenSCG openjdk-6 0 24 or whatever is the current version  Then add  JAVA HOME  bin  to the beginning of your PATH environment variable    You can edit your environment variables by contextual clicking  My  Computer  selecting Properties  clicking Advanced system settings if you   re in Windows 7  clicking the Advanced tab and then clicking Environment Variables

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For Java 12 onwards  official General-Availability  GA  and Early-Access  EA  Windows 64-bit builds of the OpenJDK  GPL2   Classpath Exception  from Oracle are available as tar gz zip from the JDK website   If you prefer an installer  there are several distributions  There is a public Google Doc and Blog post by the Java Champions community which lists the best-supported OpenJDK distributions  Currently  these are    AdoptOpenJDK  which also has a version with OpenJ9 instead of Hotspot as its VM  backed by IBM and jClarity  Amazon Corretto Liberica from Bellsoft Red Hat OpenJDK SAPMachine  backed by SAP  Zulu Community  backed by Azul Systems

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You may find OpenJDK 6 and 7 binaries for Windows in openjdk-unofficial-builds github project   Update  OpenJDK 8 and 11 LTS binaries for Windows x86 64 can be found in ojdkbuild github project   Disclaimer  I ve built them myself   Update  2019   OpenJDK Updates Project Builds for 8 and 11 are available now

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You can go to AdoptOpenJDK to download your binaries for all platforms provided by a great community

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Only OpenJDK 7  OpenJDK6 is basically the same code base as SUN s version  that s why it redirects you to the official Oracle site

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In case you are still looking for a Windows build of OpenJDK  Azul Systems launched the Zulu product line last fall  The Zulu distribution of OpenJDK is built and tested on Windows and Linux  We posted the OpenJDK 8 version this week  though OpenJDK 7 and 6 are both available too  The following URL leads to you free downloads  the Zulu community forum  and other details  http   www azulsystems com products zulu These are binary downloads  so you do not need to build OpenJDK from scratch to use them   I can attest that building OpenJDK 6 for Windows was not a trivial exercise  Of the six different platforms we ve built  OpenJDK6  OpenJDK7  and OpenJDK8  each for Windows and Linux  for x64 so far  the Windows OpenJDK6 build took by far the most effort to wring out items that didn t work on Windows  or would not pass the Technical Compatibility Kit test protocol for Java SE 6  as is    Disclaimer  I am the Product Manager for Zulu  You can review my Zulu release notices here  https   support azulsystems com hc communities public topics 200063190-Zulu-Releases I hope this helps

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You can find the thoroughly tested OpenJDK releases provided by Oracle at http   jdk java net     For example  ready to use builds of OpenJDK 10 0 2 from Oracle for 64-bit Linux  MacOS and Windows can be found at http   jdk java net 10

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Found all the windows binaries here    https   github com ojdkbuild ojdkbuild   These Windows binaries are built to keep them as close as possible in behaviour to java-x-openjdk CentOS packages

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An interesting alternative with long term support is Corretto  It was anounced by James Gosling on DevOXX recently  It is a no-cost  multiplatform  production-ready distribution of the Open Java Development Kit  OpenJDK   Corretto comes with long-term support that will include performance enhancements and security fixes  Currently it provides Java Versions 8 and 11  12 soon  and you can download binaries for all major platforms    Linux   Microsoft Windows   macOS   Docker    And the second interesting alternative is Dragonwell provided by Alibaba  It is a friendly fork but they want to upstream their changes into the openjdk repo regularily    They currently offer Java8 but the have interesting things like a backported Flight Recorder  from 11 to 8       And thirdly as already mentioned by others the adoptOpenJDK initivative is also worth looking at

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Red Hat announces they will distribute an OpenJDK for Windows platform  http   developers redhat com blog 2016 06 27 openjdk-now-available-for-windows   EDITED  thx to CaseyB comment   there is no PRODUCTION support on Windows  From the documentation      All Red Hat distributions of OpenJDK 8 on Windows are supported for development of applications that work in conjunction with JBoss Middleware  so that you have the convenience and confidence to develop and test in Windows or Linux-based environments and deploy your solution to a 100  compatible  fully supported  OpenJDK 8 on Red Hat Enterprise Linux     https   developers redhat com products openjdk overview  https   developers redhat com terms-and-conditions

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