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COMP 272 Assignment 3 solution

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AVL Trees (10 points)

Complete the deleteElement() method. This method has two parameters: integer value, Node node.
The purpose of the method is to delete an element within the tree.
This exercise is more difficult than the ones below, however this exercise is more real life, where
you are to modify existing application by adding functionality. This is a running AVL Tree that had
the method deleteElement() removed, yet I kept the method’s prologue comment there on what it
does. Those are your requirements on implementing the method.

I realize this one is more difficult than below, so kept the points to 10, but in reality, this is more real
life and what is expected of an entry level developer.

Binary Search Tree (30 points)

Implement the following methods:
• insertAll
Complete the insertAll() method. This method should accept an array of integers and insert each
of them into the tree. It should invoke a private method insert() which you need to code as well.
• increaseAll
Complete the increaseAll() method.

The purpose of this method is to traverse each node in the tree and increase the value of the
node’s data by the integer parameter passed to the method.
Tree Set (30 points)
Complete the different() method. This method should return a set containing elements that are
different between the two input Tree Sets.

Recommend using the TreeSet methods retainAll(), addAll() and removeAll() to implement
this different() method. If doing so, will only take a few lines. But in the end, just get working.
Tree Map (30 points)
Complete the removeEven() method. This method should remove entries from a given TreeMap
where the key is an even number.

This method should remove the elements from the TreeMap passed as a parameter. Recommend
Using a TreeMap iterator object and simply loop through the map removing even number keys.

Submission:

1) Before submission, make sure your code passes all the JUnit tests. Keep in mind, however, that
passing the test cases does not guarantee that your code is correct or efficient. Your assignment
will be graded considering test results, correctness, and efficiency.
2) The submission should be completed in Replit.
3) Include your name and class number as comments at the top of each submitted Java file.