Yeah, there is a typo in the class name (you need to change Interpreter2 to Interpreter).

Example test case does not compile

You really need randomized tests to make all these hard-coded implementations to fail.

Lacks tests like "1 2 a3a 5" (should yield 1, as sequence is invalid)

Expected should go first in assert* calls.

Java.

Interesting. Somehow I can see your solution, I think, because my solution passed once (though I didn't actually pressed "Submit Final" as I had debug code in it). I tried submitting yours and it failed with timeout!

Yeah, sorry about that.

Java translation submitted.

1. Test does not compile with starter code (imperfectFibonacciRabbits function must be static).
2. assertEquals accepts expected as first argument (arguments to assertEquals should be swapped).

Translated into Java.

Translated into Java.

Translated into Java.