Question: Given the statement: private static final Map counts = new TreeMap(); write a method buildWordCounts(based on buildIndex from page 332) that builds the Map object
Sets and Maps already occurred on lines 4 and 8 and we encounter it again on line 20, the ListcInteger> associated with fire would reference three Integer objects wrapping the numbers 4,8, and 20. Listing 7.2 shows method buildIndex (adapted from buildIndex in Listing 6.8). Data field index is a Map with key type String and value type List
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