• Set allWords =
entries.keySet();
• Iterator wordIterator =
allWords.iterator();
•ask the entries field (a
TreeMap) for its keySet
•ask the keySet to give you an
Iterator
•wI is like a list of the keys in
the entries Map
•You can infer from this code
that
–Set and Iterator are classes in
the Java API
–keySet is a method in class
TreeMap; it returns a Set
–iterator is a method in class
Set; it returns an Iterator