+ //TreeMap<String, Integer> tm = new TreeMap<String, Integer>(new StrComparator());
+ // default TreeMap comparator keep alphabetical order
+ TreeMap<String, Integer> tm = new TreeMap<String, Integer>();
+ File f = new File("test_file.txt");
+ try {
+ Scanner sc = new Scanner(f);
+ while (sc.hasNext()) {
+ String wordCursor = sc.next();
+ //NOTE: words comparaison is case sensitive and punctuation aware
+ Integer count = tm.get(wordCursor);
+ if (count == null) {
+ count = 0;
+ }
+ tm.put(wordCursor, count + 1);
+ }
+ sc.close();
+ }
+ catch (IOException e) {
+ e.printStackTrace();
+ }