We adopt a top-down design approach that starts from architectural design based on a pattern diagram, proceeds with expansion of patterns into their predefined class diagrams, and further refines the ...

Design patterns have evolved to solve problems often encountered in software applications. The factory method design pattern and the abstract factory design pattern are both creational patterns.

When designing applications, it is important to know when to use an abstract class and when to use an interface. Although abstract classes and interfaces seem similar in some ways, there are key ...