8  Lab Thursday pm:

Software provided:

• Classes that represent a list of books with author information, where author information includes the name and year of birth.

• Interfaces IFilter and IFilter2 with examples of use.

• File objlists.java

Goals

• Learn to define and work with lists of Objects

• Learn to define interfaces and design classes that implement them

• Learn to use interfaces to design classes that encapsulate only behavior

Details

1. A list of Objects

   • Open the file objlists.java.

   • Draw by hand a class diagram that represents these classes.

   • Add two of your favorite books (and their authors) to the examples and to one of the lists in the examples and add tests that use your examples.

   • Make examples of lists of Authors.

   • Add the method remove(Object obj) that produces a list with only the first occurrence of the given object removed from the list.

2. Using an interface

   • class Book implements the interface IFilter. Study the code. Study the code that implements orMap. Add two more test cases to the test suite.

   • Modify the class Author, so it implements the interface IFilter to select authors born after 1945.

   • Add tests that verify the implementation of the methods orMap and howMany on your list of authors.