J# Sharp Programming Language | Learn J# Sharp Programming | J# Sharp Programming Tutorial | J# Sharp Programming Example | J# Sharp Programming Books
Visual J# (pronounced “jay-sharp”) programming language was a transitional language for programmers of Java and Visual J++ languages, so they could use their existing knowledge and applications on .NET Framework.
J# worked with Java bytecode as well as source so it could be used to transition applications that used third-party libraries even if their original source code was unavailable. It was developed by the Hyderabad-based Microsoft India Development Center at HITEC City in India.
Fundamental differences between J# and Java
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 JavaBean class, it is necessary to prefix getter and setter methods with the Javadoc-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 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. Finally, Java Native Interface (JNI) and Raw Native Interface (RNI) are substituted with P/Invoke; J# does not support Remote Method Invocation (RMI)
Future of J#
In January 2007, Microsoft announced:
That Microsoft would produce an updated version of Visual J# 2.0, including a 64-bit redistributable 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 retirement of the J# language and Java Language Conversion Assistant from future versions of Visual Studio. The last version, shipping with Visual Studio 2005, was supported until 2015.
Calling J# code from .NET 4.0 code would fail unless vjsnativ.dll was pre-loaded.
A link to download Visual J# 2005 Express Edition is no longer available from Microsoft’s website; however, the link which was previously available was still functional as of 2017.
Visual J# is out of mainstream support but “Visual J# 2.0 Redistributable Second Edition released in 2007, with support continuing through to 2017 (5 years mainstream and 5 years extended support) on EN-US locales.” Support for the Visual J# Version 2.0 Redistributable Package Second Edition will be discontinued from October 10, 2017.
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