Lecture on Design Patterns

Prime objective of this lecture is to presentation on Design Patterns. Here explain all design pattern names and categories, they are Factory pattern and Command pattern. Design pattern is often a solution to a common software problem within a context. Factory is a category whose sole job is always to easily create and return instances of other classes. Command can be an object that represents an action. Here also briefly discuss on Common UI commands, Command pattern applications, Action and Swing components with proper explanation and examples.