Assignment 5 - additional hints and clarification
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The timing program sets up the data needed to perform the tests,
runs the tests and collects the timing data, then reports on the
results. When you cannot estimate how long the tests will run, it 
helps if you also print the results of each test, as soon as it 
completes.

You should test the behavior of the methods:

bt.build, bt.contains, and the behavior of the Iterator produced
by the bt.iterator() method.

The tests for the method bt.build and for the iterator should
be run with a number of different data set sizes (and with all three
different Comparator-s).

The tests for the bt.contains method check the time it takes to 
find an item in the binary search tree. The file contains.txt
provides for you the String-s that you should look for. Again, 
record the time you need to find all 100 String-s in each of the 
data sets you have built earlier.