Understanding Java: Chapter 11

These pages contain links to the programs that are developed in Chapter 11. The title of this chapter is: Using interfaces and classes to produce new types.

Date.java	Stage A: a simple version of class Date that is used by NoelProg
NoelProg.java	Stage A: This program uses the simple version of the class Date
11A.zip	Stage A: A zip file containing the above two files
Date.java	Stage B: adding a constructor and a method declaration to Date
NoelProg.java	Stage B: This program uses the class Date that has a constructor
11B.zip	Stage B: A zip file containing the above two files
Date.java	Stage C: providing access methods and the toString method
NoelProg.java	Stage C: NoelProg modified to use access methods and toString
11C.zip	Stage C: A zip file containing the above two files
Date.java	Stage D: adding a class variable and class methods to Date
NoelProg.java	Stage D: using Date's class method in NoelProg
11D.zip	Stage D: A zip file containing the above two files
Date.java	Stage E: adding other constructors and an equals method to Date
NoelProg.java	Stage E: NoelProg modified to use other constructors and equals
11E.zip	Stage E: A zip file containing the above two files
Date.java	Stage F: the Date class modified so that it will work with collections
NoelProg.java	Stage F: the NoelProg program
11F.zip	Stage F: A zip file containing the above two files
Date.java	Stage G: the Date interface
DateImpl.java	Stage G: the DateImpl class implements the Date interface
NoelProg.java	Stage G: using Date and DateImpl in the NoelProg program
11G.zip	Stage G: A zip file containing the above three files
DateImplY.java	Stage G: the DateImplY class also implements the Date interface
11H.zip	Stage G: A zip file containing Date, DateImplY and NoelProg