Is there any Example of Kalman Filter in Java?

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I am using OpenCV 3.0 beta, I want to use Kalam Filter, but i cannot find any example of the Kalman Filter implementation in Java, I have tried the example code in C++ and Python, but I cannot completely translate these code to Java, then I searched a lot through internet and couldn't find any example or tutorial. So if any one can give some working example of Kalman Filter implementation in Java it will be big help for me. Thanks in advance!!