Name:


Lab Section:

1. We cleaned up words and phrases by deleting punctuation from Strings. Suppose we want to add a method to KWIC:

     public boolean isPunctuation(char ch)
   

   which indicates whether the supplied character is a puncutation symbol. and the constructor for KWIC now also takes a String:

     public KWIC(String punctuationChars)
   

   so that if I do

     KWIC kwic = new KWIC(".,!?");
   

   then every character in the supplied string should be treated as punctuation.

   Why can or cannot the isPuncutation method be a static method for KWIC?

2. What objects have access to a method that is declared protected?

3. What objects have access to a method that is declared with "default" protection (no modifier specified)?

4. When getPhrases(Word w) does not find w in the Hash Map, it returns an iterator of an empty set, perhaps by doing:

     return (new HashSet()).iterator();
   

   How can the Singleton pattern be applied here to save on instances of HashSets?