How can I get the java src for cells app

I want to implment something like cells app,especially like excel editor app
but I find the source code is dotnet code
is there java solution to implment it? I find aspose cells has java version . aspose cells.jar
so how to go on ?
can you help me ?or suggest some usefully way

@dantedom4j

Please check out this demo app. If you require additional information regarding the Aspose.Cells for Java back-end API/application, please bring it up on this forum.