Calling Java from Matlab

Calling Java from my Matlab script (Matlab R2014a).

I have the following:

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dpath = 'D:\Users\spal\Documents\spal_matlab_folder\myOwnJarFile.jar';

    javaaddpath(dpath);

import ('com.ourdomain.main.*');

         [M,X,J] = inmem

timeseries = ... horiz = 4;

JA = javaMethod('dealWithNegatives','ForecastKthStep',forecast,horiz);

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The error I have is that Matlab can't find the class "ForecastKthStep" which has the "public static" method named "dealWithNegatives" that takes 2 arguments "forecast" matrix and "horiz" for time horizon.

What am I doing wrong here?

Any tips would be much appreciated.

Cheers.