✴ Design patterns are programming language independent strategies for solving the common object-oriented design problems. That means, a design pattern represents an idea, not a particular implementation.✴ ► By using the design patterns you can make your code more flexible, reusable and maintainable. It is the most important part because java internally follows design patterns.✦ ► To become a professional software developer, you must know at least some popular solutions (i.e. design patterns) to the coding problems.✦ 【Topics Covered in this App are Listed Below】 ⇢ Design Pattern – Overview ⇢ Factory Pattern ⇢ Abstract Factory Pattern ⇢ Singleton Pattern ⇢ Builder Pattern ⇢ Prototype Pattern ⇢ Adapter Pattern ⇢ Bridge Pattern ⇢ Filter/Criteria Pattern ⇢ Composite Pattern ⇢ Decorator Pattern ⇢ Facade Pattern ⇢ Flyweight Pattern ⇢ Proxy Pattern ⇢ Chain of Responsibility Pattern ⇢ Command Pattern ⇢ Interpreter Pattern ⇢ Iterator Pattern ⇢ Mediator Pattern ⇢ Memento Pattern ⇢ Observer Pattern ⇢ State Pattern ⇢ Null Object Pattern ⇢ Strategy Pattern ⇢ Template Pattern ⇢ Visitor Pattern ⇢ MVC Pattern ⇢ Business Delegate Pattern ⇢ Composite Entity Pattern ⇢ Data Access Object Pattern ⇢ Front Controller Pattern ⇢ Intercepting Filter Pattern ⇢ Service Locator Pattern ⇢ Transfer Object Pattern ⇢ Eager initialization ⇢ Lazy initialization ⇢ Static block initialization ⇢ Bill pugh solution ⇢ Background information of factory pattern ⇢ Strategy Design Pattern ⇢ Single Responsibility Principle ⇢ The Open/Closed Principle and Strategy Pattern ⇢ Liskov’s Substitution Principle (LSP) ⇢ Interface Segregation Principle (ISP) ⇢ The Dependency Inversion Principle ⇢ Copy Constructor in Java ⇢ Cloning using In-memory Serialization ⇢ Fluent Interfaces ⇢ Using Enum ⇢ Adding readResolve() ⇢ Adding a serial version id ⇢ The Vector Class