From bfefa55188568e3959ff58e4dfb48c0a26282cb4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilkka=20Sepp=C3=A4l=C3=A4?= Date: Sun, 24 Aug 2014 23:27:58 +0300 Subject: [PATCH] Update README.md --- README.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/README.md b/README.md index a0be7bcac..a207886c1 100644 --- a/README.md +++ b/README.md @@ -198,6 +198,12 @@ ##State **Intent:** Allow an object to alter its behavior when its internal state changes. The object will appear to change its class. +![alt text](https://github.com/iluwatar/java-design-patterns/blob/master/state/etc/state.jpg "State") + +**Applicability:** Use the State pattern in either of the following cases +* an object's behavior depends on its state, and it must change its behavior at run-time depending on that state +* operations have large, multipart conditional statements that depend on the object's state. This state is usually represented by one or more enumerated constants. Often, several operations will contain this same conditional structure. The State pattern puts each branch of the conditional in a separate class. This lets you treat the object's state as an object in its own right that can vary independently from other objects. + ##Strategy **Intent:** Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.