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tallyLetters

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

Write a method named tallyLetters that accepts a string as a parameter and that returns a Multiset of counts of occurrences of each alphabetic letter (Character) in the string, case-insensitively. For example, given the string "Hello How is he DOING?", return the multiset [D, E x 2, G, H x 3, I x 2, L x 2, N, O x 3, S, W]. Ignore any characters that are not letters (A-Z).

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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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