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byStartingLetter

Language/Type: Java Guava Multimap collections
Author: Marty Stepp (on 2013/01/22)

Write a method named byStartingLetter that accepts an array of words (strings) as a parameter and that returns a Multimap of the words, keyed by their starting letter (Character), case-insensitively. For example, if the array ["Hello", "how", "is", "dear", "old", "Dad", "DOING?"] is passed, return the multimap {D=[dad, dear, doing], H=[Hello, how], I=[is], O=[old]}.

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This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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