Data Abstraction and Problem Solving with JAVA Walls

Data Abstraction and Problem Solving with JAVA Walls and Mirrors Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Principles of Programming And Software Engineering Data Abstraction and Problem Solving with JAVA: Walls and Mirrors Carrano / Prichard

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Figure 1. 1 The life cycle of software as a water wheel that can rotate from one phase to any of phase

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Figure 1. 2 The details of the sorting algorithm are hidden from other parts of the solution.

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Figure 1. 3 A digital clock

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Three Principles of Object-Oriented Programming • Encapsulation: Objects combine data and operations. • Inheritance: Classes can inherit properties from other classes. • Polymorphism: Objects can determine appropriate operations at execution time.

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Figure 1. 4 A structure chart showing the hierarchy of modules

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Key Issues in Programming • • • Modularity Modifiability Ease of use Fail-safe programming Style Debugging

Data Abstraction and Problem Solving with JAVA Walls and Mirrors; Frank M. Carrano and Janet J. Prichard © 2001 Addison Wesley Essential Features of Program Documentation • • • Statement of purpose Author and date Description of the program’s input and output Description of how to use the program Assumptions such as the type of data expected Statement of exceptions Brief description of the major classes Comments in each class comments in each method Comments in the body of each method