Visual J Sharp

<h2 id="fundamental-differences-between-j-and-java">Fundamental differences between J# and Java</h2>
Java and J# use the same general syntax but there are non-Java conventions in J# to support the .NET environment. For example, to use .NET "properties" with a standard <a href="/facts/JavaBean/C0HvUnQ5">JavaBean</a> class, it is necessary to prefix getter and setter methods with the <a href="/facts/Javadoc/pm72Xvlf">Javadoc</a>-like annotation:

/** @beanproperty */

…and change the corresponding private variable name to be different from the suffix of the getXxx/setXxx names.
J# does not compile Java-language source code to Java bytecode (.class files), and does not support <a href="/facts/Java_applet/oulP2dyy">Java applet</a> development or the ability to host applets directly in a <a href="/facts/Web_browser/2pfyymLs">web browser</a>, although it does provide a wrapper called Microsoft J# Browser Controls for hosting them as <a href="/facts/ActiveX/xJb7t7Eh">ActiveX</a> objects. Finally, <a href="/facts/Java_Native_Interface/Q3E0I6lL">Java Native Interface</a> (JNI) and <a href="/facts/Java_Native_Interface/Q3E0I6lL">raw native interface</a> (RNI) are substituted with <a href="/facts/Platform_Invocation_Services/7MQWrCE8">P/Invoke</a>; J# does not support <a href="/facts/Remote_method_invocation/boz8jDHe">remote method invocation</a> (RMI).<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a>
<a href="/facts/InfoWorld/EJ0zA8FV">InfoWorld</a> said: "J#'s interface to the .NET framework is solid, but not as seamless as <a href="/facts/C_Sharp_(programming_language)/UC2gxeyb">C#</a>. In particular, J# code cannot define new .NET attributes, events, value types, or delegates. J# can make use of these language constructs if they are defined in an assembly written in another language, but its inability to define new ones limits J#'s reach and interoperability compared to other .NET languages."<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a>
Contrariwise, Microsoft documentation for Visual Studio 2005 details the definition of .NET delegates,<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a> events,<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a> and value types<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a> directly in J#.

<h2 id="history-of-j">History of J#</h2>
In January 2007, Microsoft announced:<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a>

<ul><li>That Microsoft would produce an updated version of Visual J# 2.0, including a <a href="/facts/64-bit_computing/AgvkQHkM">64-bit</a> <a href="/facts/Freely_redistributable_software/sa3G8581">redistributable</a> version, called J# 2.0 Second Edition to meet customer demand for 64-bit runtime support. Microsoft released Visual J# 2.0 Second Edition in May 2007.<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a></li>
<li>Retirement of the J# language and Java Language Conversion Assistant from future versions of <a href="/facts/Visual_Studio/omNe6Lej">Visual Studio</a>. The last version, shipping with Visual Studio 2005, was supported until 2015.</li>
<li>Calling J# code from .NET 4.0 code would fail unless vjsnativ.dll was pre-loaded.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a></li></ul>
The download of Visual J# 2005 Express Edition is no longer available from Microsoft's website.
Visual J# is out of support including the Visual J# 2.0 Redistributable Second Edition released in 2007, that was supported through to 2017 "(5 years mainstream and 5 years extended support) on EN-US locales."<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a><a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/IKVM/rtBVMawy">IKVM</a> – a free implementation of Java for <a href="/facts/Mono_(software)/PlyeJxRS">Mono</a> and <a href="/facts/.NET_Framework/J6QDAUhP">.NET Framework</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://web.archive.org/web/20080226122937/http://msdn2.microsoft.com:80/en-us/vjsharp/default.aspx">Official website</a> at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a> (archived February 26, 2008)</li>
<li><a href="https://web.archive.org/web/20070416013526/http://msdn2.microsoft.com:80/en-us/vjsharp/bb188610.aspx">Visual J# Design Choices: A Conversation with Pratap Lakshman</a> at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a> (archived 2007-04-16)</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">"Visual J# Home". msdn.microsoft.com. Retrieved 2017-03-24. <a href="https://msdn.microsoft.com/en-us/vstudio/bb188593" target="_blank">https://msdn.microsoft.com/en-us/vstudio/bb188593</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">"Java to .NET Framework Migration Workshop: Free Online Training". 30 April 2007. Archived from the original on 2008-04-23. Retrieved 2020-01-28.{{cite web}}: CS1 maint: bot: original URL status unknown (link) <a href="https://web.archive.org/web/20080423005729/http://msdn2.microsoft.com/en-us/vjsharp/aa700852.aspx" target="_blank">https://web.archive.org/web/20080423005729/http://msdn2.microsoft.com/en-us/vjsharp/aa700852.aspx</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Microsoft News, [1], 1 July 2002 <a href="https://news.microsoft.com/2002/07/01/microsoft-rounds-out-developer-languages-with-launch-of-visual-j-net/" target="_blank">https://news.microsoft.com/2002/07/01/microsoft-rounds-out-developer-languages-with-launch-of-visual-j-net/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">S Prasanna, Microsoft's VJ#.Net is made in India, Express Computer, 29 July 2002 Archived 28 November 2013 at the Wayback Machine <a href="http://www.expresscomputeronline.com/20020729/indnews3.shtml" target="_blank">http://www.expresscomputeronline.com/20020729/indnews3.shtml</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">"The Hindu Business Line : Microsoft lines up big plans for Hyderabad centre". www.thehindubusinessline.com. <a href="http://www.thehindubusinessline.com/bline/2002/08/15/stories/2002081500530700.htm" target="_blank">http://www.thehindubusinessline.com/bline/2002/08/15/stories/2002081500530700.htm</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">"Announcing General Availability of Microsoft Build of OpenJDK". Java at Microsoft. 2021-05-25. Retrieved 2021-08-03. <a href="https://devblogs.microsoft.com/java/announcing-general-availability-of-microsoft-build-of-openjdk/" target="_blank">https://devblogs.microsoft.com/java/announcing-general-availability-of-microsoft-build-of-openjdk/</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">"Visual J# Migration". Visual Studio 2005. MSDN Library. Archived from the original on 2012-03-16. Retrieved 2021-12-25. <a href="https://web.archive.org/web/20120316061217/http://msdn.microsoft.com/en-us/library/7622y256(v=vs.80).aspx" target="_blank">https://web.archive.org/web/20120316061217/http://msdn.microsoft.com/en-us/library/7622y256(v=vs.80).aspx</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Yager, Tom (21 November 2001). "Just don't call J# Java". InfoWorld. Retrieved 2020-07-20. <a href="https://www.infoworld.com/article/2075819/just-don-t-call-j--java.html" target="_blank">https://www.infoworld.com/article/2075819/just-don-t-call-j--java.html</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">"delegate (Visual J#)". Visual Studio 2005. MSDN Library. Archived from the original on 2011-12-19. <a href="https://web.archive.org/web/20111219230625/http://msdn.microsoft.com/en-US/library/0kks3c36(v=VS.80).aspx" target="_blank">https://web.archive.org/web/20111219230625/http://msdn.microsoft.com/en-US/library/0kks3c36(v=VS.80).aspx</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">"Definition and Use of Events". Visual Studio 2005. MSDN Library. Archived from the original on 2011-12-19. <a href="https://web.archive.org/web/20111219230625/https://msdn.microsoft.com/en-us/library/09b0135h(v=vs.80).aspx" target="_blank">https://web.archive.org/web/20111219230625/https://msdn.microsoft.com/en-us/library/09b0135h(v=vs.80).aspx</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">"User-Defined Value Types". Visual Studio 2005. MSDN Library. Archived from the original on 2011-12-20. <a href="https://web.archive.org/web/20111220004451/http://msdn.microsoft.com/en-US/library/wysdab55(v=VS.80).aspx" target="_blank">https://web.archive.org/web/20111220004451/http://msdn.microsoft.com/en-US/library/wysdab55(v=VS.80).aspx</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Microsoft Developer Network, Visual J# Product Announcement, 10 January 2007 <a href="http://msdn.microsoft.com/en-us/vjsharp/" target="_blank">http://msdn.microsoft.com/en-us/vjsharp/</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">"Visual J# 2.0 Second Edition Redistributable Download". Microsoft. Archived from the original on 2007-05-23. Retrieved 2010-04-27.{{cite web}}: CS1 maint: bot: original URL status unknown (link) <a href="https://web.archive.org/web/20070523221606/http://www.microsoft.com/downloads/details.aspx?familyid=42C46554-5313-4348-BF81-9BB133518945&displaylang=en" target="_blank">https://web.archive.org/web/20070523221606/http://www.microsoft.com/downloads/details.aspx?familyid=42C46554-5313-4348-BF81-9BB133518945&displaylang=en</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">"Calling J# code from .NET 4.0 - Windward Wrocks". Retrieved 6 March 2017. <a href="http://blogs.windwardreports.com/davidt/2011/02/calling-j-code-from-net-40.html" target="_blank">http://blogs.windwardreports.com/davidt/2011/02/calling-j-code-from-net-40.html</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">"Visual J# Home". Retrieved 6 March 2017. <a href="https://msdn.microsoft.com/en-us/vstudio/bb188593" target="_blank">https://msdn.microsoft.com/en-us/vstudio/bb188593</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">"End of Support for Visual Studio 2008 – in One Year". Retrieved 2017-04-11. <a href="https://blogs.msdn.microsoft.com/visualstudio/2017/04/10/end-of-support-for-visual-studio-2008-in-one-year/" target="_blank">https://blogs.msdn.microsoft.com/visualstudio/2017/04/10/end-of-support-for-visual-studio-2008-in-one-year/</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
</ol>

Visual J Sharp open-in-new

Visual J Sharp