dictionary in java

The idea is that we are writing an anagram solver, using a given set of words, that we store in 3 different dictionary classes: Linear, Binary, and Hash. So we read in the words from a textfile, and for the first 2 dictionary objects (linear and binary), we store the words as an ArrayList...easy enough. But for the HashDictionary, he want's us ... lirik i can love you in the dark