I must get two different client application talk without any kind of broker or server.
What is the best method for IPC beween two process, Java and .NET?
You can access WinAPI through JNI(Java) and PInvoke(C#).
Use following WinAPI functions:
CreateEvent
SetEvent
WaitForSingleObject
CreateMutex
ReleaseMutex
CreateFileMapping (for share memory)
MapViewOfFile
UnmapViewOfFile