added diagrams

Author: premaseem

README.md

@@ -1,2 +1,26 @@
-# 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 Visitor Design Pattern 
+Visitor design pattern uses a visitor class which changes the executing algorithm of an element class. By this way, execution algorithm of element can vary as and when visitor varies.
+
+## Diagram
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/Visitor-Pattern-class-diagram%20.png "Diagram")
+
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/visitorPattern-generic.jpeg "Diagram")
+
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/VisitorSequenceDiagram.png "Diagram")
+
+### When to use Visitor  Design Pattern 
+Visitor pattern is used when we have to perform an operation on a group of similar kind of Objects. With the help of visitor pattern, we can move the operational logic from the objects(Elements) to another class (Visitor class).
+
+### 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
+
+### 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/Visitor-Pattern-class-diagram .png

@@ -13,8 +13,8 @@ public static void main(String[] args) {
 		int repeatRunFlag = 1;
 		while (repeatRunFlag == 1) {
 			System.out.println("Which party do you want to host ");
-			System.out.println("press 1 for Week end party ");
-			System.out.println("press 2 for Week day party ");
+			System.out.println("press 1 for Loud party ");
+			System.out.println("press 2 for Silent party ");
 			int tvType = scan.nextInt();
 			if (tvType == 1) {
 				party = new LoudParty();