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There is a program called Java Language Conversion Assistant (JLCA). JLCA is a tool that provides the ability to convert Java code and library calls to Microsoft Visual C# .NET. Built based on the ArtinSoft migration technology, this second version adds a number of additional features to its abilities. This includes the ability to convert code from both the client and the server. Developers will be able to convert Web as well as Windows®-based applications. Java Server Pages and Java servlets can also be converted to ASP.NET.

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there is no consumer-friendly way. surely, some issues that are incredibly elementary in C are incredibly perplexing to enforce in Java. and a few issues that are implicit in Java require complicated hoop-leaping to end in C. i does no longer even attempt to translate any large application from one to the different, it is in simple terms loopy.