Why Design Patterns?
A design pattern is a pattern a way to pursue an intent that uses classes and their methods in an object-oriented language. Developers often start thinking about design after learning a programming language and writing code for a while. You might notice that someone else’s code seems simpler and works better than yours does, and you might wonder how that person achieves this simplicity. Design patterns are a level up from code and typically show how to achieve a goal, using one to ten classes. Other people have figured out how to program effectively in object-oriented languages. If you want to become a powerful Java programmer, you should study design patterns, especially those in Design Patterns.
