[1][2] It was introduced in 2002[3] and discontinued in 2007, with support for the final release of the product continuing until October 2017.
Microsoft ceased such support for the MSJVM on December 31, 2007 (later Oracle bought Sun, and with it Java and its trademarks).
Microsoft however, officially started distributing Java again in 2021 (though not bundled with Windows or its web browsers as before with J++), i.e. their build of Oracle's OpenJDK,[6] which Microsoft plans to support for at least 6 years, for LTS versions, i.e. to September 2027 for Java 17.
J# does not compile Java-language source code to Java bytecode (.class files), and does not support Java applet development or the ability to host applets directly in a web browser, although it does provide a wrapper called Microsoft J# Browser Controls for hosting them as ActiveX objects.
"[8] Contrariwise, Microsoft documentation for Visual Studio 2005 details the definition of .NET delegates,[9] events,[10] and value types[11] directly in J#.