update readme.md

premaseem · premaseem · commit 323f03ad6ae9 · 2018-08-08T18:11:20.000-05:00
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-# DesignPatternsJava9
-This repo consists Gang of Four Design patterns code on Java 9. Each branch in the repository has code of 1 design pattern. Switch repository to try out different design patterns.
+# What is Facade Design Pattern 
+* Facade pattern adds an interface to existing system or group of sub systems to hide its complexities
+* This pattern involves a single class which provides interface with simplified methods required by client and delegates calls to methods of existing system classes.
+
+## Diagram
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/facade-pattern/diagrams/4_3%20Facade%20class%20diagram.jpeg "Diagram")
+
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/facade-pattern/diagrams/4_3%20facade%20sequence.png "Diagram")
+
+### When to use Facade Design Pattern 
+When application needs a simplified interface to the overall functionality of a complex subsystem.
+
+### Learn Design Patterns with Java by Aseem Jain
+This repository contains working project code used in video Course by Packt Publication with title "Learn Design Patterns with Java " authored by "Aseem Jain".
+
+### Course link: 
+https://www.packtpub.com/application-development/learn-design-patterns-java-9-video
+
+### ![ http://in.linkedin.com/in/premaseem](https://github.com/premaseem/DesignPatternsJava9/blob/master/linkedin.png "http://in.linkedin.com/in/premaseem") Profile:  http://in.linkedin.com/in/premaseem
+
+### Authors blog on design patterns:
+https://premaseem.wordpress.com/category/computers/design-patterns/
+
+### Software Design pattern community face book page:
+https://www.facebook.com/DesignPatternGuru/
+
+### Note: 
+* This code base will work on Java 9 and above versions. 
+* `diagrams` folders carry UML diagrams.
+* `pattern` folder has code of primary example. 
+* `patternBonus` folder has code of secondary or bonus example.
