Word Frequency with TreeMap

The array words = {"apple", "banana", "apple", "cherry", "banana", "apple"} is given. Count how many times each word appears and print one line per word in the form word: count, with the words in alphabetical order:

apple: 3
banana: 2
cherry: 1

Use a TreeMap<String, Integer> (which keeps its keys sorted) together with getOrDefault to update the counts.

Expected Output:

apple: 3
banana: 2
cherry: 1

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