Java Design Pattern

1. Creational Design Patterns:  Creational design patterns deal with the creation of object in the best possible way in the specific situation.​ Some of the creational design patterns are as follow:​
   1. Singleton Design Pattern
   2. Factory Design Pattern
   3. Abstract Factory Design Pattern
   4. Builder Design Pattern
   5. Prototype Design Pattern
   6. Object Pool Design Pattern

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2. Structural Design Patterns:  Structural design patterns  provide different ways to create class structure. Some of the structural design patterns are as follow:
   1. Bridge Design Pattern
   2. Facade Design Pattern
   3. Proxy Design Pattern
   4. Composite Design Pattern
   5. Decorator Design Pattern
   6. ​Adapter Design Pattern

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3. Behavioral Design Pattern: Behavioral design patterns provide solution for the bettern interaction between objects and how to provide loose couplings and flexibility to extend. Some of the behavioral design patterns are as follow:
   1. Mediator Design Pattern
   2. Iterator Design Pattern
   3. Strategy Design Pattern
   4. Command Design Pattern
   5. Interpreter Design Pattern
   6. Observer Design Pattern

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Apart from above mentoined three main types, There are some design patterns that deals with multi-threaded programming paradigm. Those are known as Concurrency Design Patterns.  Some of the concurrency design patterns are as follow:

1. Producer Consumer Design Pattern
2. Leaders/followers pattern
3. Read write lock pattern
4. Balking pattern
5. Scheduler pattern
6. Thread pool pattern
7. Barrier pattern
8. Double-checked locking
9. Guarded suspension pattern
10. Reactor pattern