The PiCalculationSample code at the bottom of this page imports two classes that don't exist in the processing pattern src/jar which are linked from that page: coherence-3.6-processingpattern-188.8.131.5219.jar
Nor are they contained in coherence.jar or coherence-3.6-common-184.108.40.20619.jar
The classes in question are namely:
Where can I find these classes or what am I missing?
There is mismatch in the jar version and the code version as in the latest these classes have been removed. It will be better if you download the Incubator Examples that includes all the patterns and the test code for each them. It also include the relevant jars.