THE MOST EFFECTIVE APPROACH FOR TRUE OBJECT-ORIENTED PROGRAM DESIGN

The purpose of this project is to display the use of the Design Recipe pedagogy and the idea of focusing on the design of the structure of data, the classes, and class hierarchies, rather than the design of program actions as the core idea for program design. The Design Recipe approach is superior to other programming methods in many ways. I started this project by first examining Carl Alphonces Java code for a cal-culator program in the May 2004 issue of Curricular Patterns [1]. The code was difficult to understand and did not showcase true object-oriented design. I ex-amined another poorly designed calculator program found in Objects First with Java A Practical Introduction using BlueJ [2]. Both of these solutions contain many unnecessary if-else statements and demonstrate erroneous use of object-oriented languages. I knew if I followed the Design Recipe, which consists of a structured set of steps to follow during the design process, that I would arrive at a better solution. My first goal was to design a simple calculator with the fou