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 shown above.

Here is the first 4 lines of the code that was given to us:

public static void buildWordCounts(Scanner scan) {

while (scan.hasNextLine()) {

String token;

while ((token = scan.findInLine("[\\p{L}\\p{N}']+")) != null) {

Sets and Maps already occurred on lines 4 and 8 and we encounter it again on line 20, the List 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