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README for COMP204-07B Assignment 1
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This is the first of six assignments for COMP204-07B. The purpose of this
exercise is to test some of the ideas and concepts about Java as discussed
in class in the first two weeks.

In this assignment you will write a Java class that implements an
immutable set of arbitrary objects. Your class should support
typed sets (like any collection class). The best way to implement
ImmutableSet would be by way of composition, using some existing
Set class.

Make sure to implement the two constructors specified in the
ImmutableSet.java template and no others.

Make sure your implementation of ImmutableSet passes all the test cases specified in
the test class TestImmutableSet, which is stored in TestImmutableSet.java. To execute
the tests, simply run TestImmutableSet.java as a Java application. This will perform
the specified tests on the methods in your ImmutableSet class. To get marks for this
assignment, your class MUST pass ALL the test cases. Note especially the test case
that tries to corrupt your immutable set implementation by defining a subclass which
provides a mutator method (ShouldNotCompile.java). You can prevent against such 
circumvention in at least two different ways.

Once you are happy with your code, submit it using the online submission system.
This submission system will be linked to from the course home page. Note that you
can only submit from computers *on* campus, including the lab.