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Since we have the basic functionality of a hash map, let’s create a test instance of one for us to make sure everything works as expected.
Instructions
1.
Outside the HashMap class (completely unindented below the class definition) create a new hash map called hash_map. Give it an array size of 20.
2.
We want to use this hash map to store geologic information — types of rocks.
In hash_map save the value "metamorphic" for the key "gneiss".
3.
Now retrieve the value of hash_map for the key gneiss. Print it out, does your HashMap work as expected?
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