What is the Java Platform:-

An intermediate JVM makes the Java language device independent because each JVM on the various platforms interpret byte-code the same way.

To optimize Java software performance, the Version 4 Release 2 Operating System on IBM's AS/400 computers has JVM integrated beneath their Machine Interface (MI). On AS/400 V4R2's, Java classes can be run through a "transformer" to compile Java class files into AS/400-dependent object code using the AS/400 Developer Kit (JDK 1.1.4).

Microsoft added Java language support after the initial release of their .NET (dot NET) initiative. The Microsoft Visual J#.NET Redistributable Package 1.1 is installed as a separate program.

Microsoft's does not make use of J# (pronounced J Sharp) code like other Java implementations. Microsoft has its own compilation and run-time architecture for .NET programs.