They provide transparency to the design of an application.They capture the software engineering experiences.They provide the solutions that help to define the system architecture.They are reusable in multiple projects.To become a professional software developer, you must know at least some popular solutions (i.e. It is the most important part because java internally follows design patterns. That means, a design pattern represents an idea, not a particular implementation.īy using the design patterns you can make your code more flexible, reusable and maintainable. What are those specifications, you will see later in the types of design patterns.īut remember one-thing, design patterns are programming language independent strategies for solving the common object-oriented design problems. So, every design pattern has some specification or set of rules for solving the problems. Singleton design pattern is the best solution of above specific problem. Suppose you want to create a class for which only a single instance (or object) should be created and that single object can be used by all other classes. Now, a question will be arising in your mind what kind of specific problem? Let me explain by taking an example. A design patterns are well-proved solution for solving the specific problem/task.
