The design patterns have evolved since 1992, and even today, it is inevitable in solving many software design problems in a proven technique and practices called design patterns. It is not difficult to see any specific pattern as a solution or technique that can be analyzed, implemented, and reused, but it is difficult to characterize the problem it solves and the context in which it is the best fit. It is critical to know the purpose of the patterns, as it helps understand the existing design of any given system.
With this chapter, we touched upon the key elements of OOD, abstraction, encapsulation, modularization, and hierarchy along with a few additional items such as typing, concurrency, and persistence.
Also, we discussed the design principles, hoping that the readers get a SOLID understanding of what OO principles offer to OO software designers. We believe that the...
