Design Pattern

Design patterns may be said as a set of probable solutions for a particular problem which is tested to work best in certain situations.

Design Patterns provide standardized and efficient solutions to software design and programming problems that are re-usable in your code. Software Architects and developers use them to build high quality robust applications.

Uses of Design Patterns

While creating an application, we think a lot on how the software will behave in the long run. It is very hard to predict how the architecture will work for the application when the actual application is built completely. There might issues which you cant predict and may come while implementing the software. Design patterns helps you to find tested proven design paradigm. Following design pattern will prevent major issues to come in future and also helps the other architects to easily understand your code.

Types of Design Pattern

Design patterns can be divided into 3 categories.

Creational Patterns : These patterns deals mainly with creation of objects and classes.

In software engineering, creational design patterns are design patterns that deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. The basic form of object creation could result in design problems or in added complexity to the design.

Structural Patterns : These patterns deals with Class and Object Composition.

Behavioural Patterns : These mainly deals with Class - Object communication. That means they are concerned with the communication between class and objects.

Creation design pattern:

1. Singleton pattern.

2. Factory pattern

3. Factory method

4. Abstract factory

5. Builder pattern

6. Prototype Pattern

Structural design Pattern:

1. Adapter pattern

2. Bridge Pattern

3. Decorator pattern

4. Composite pattern

5. Flyweight pattern

6. memento pattern

Behavioural design Pattern:

1. Mediator pattern

2. Observer Pattern

3. Iterator pattern