Update README.md

iluwatar · iluwatar · commit 0b7892d234e8 · 2014-08-24T20:03:29.000+03:00
diff --git a/README.md b/README.md
@@ -106,6 +106,15 @@
 ##Flyweight
 **Intent:** Use sharing to support large numbers of fine-grained objects efficiently.
 
+![alt text](https://github.com/iluwatar/java-design-patterns/blob/master/flyweight/etc/flyweight.jpg "Flyweight")
+
+**Applicability:** The Flyweight pattern's effectiveness depends heavily on how and where it's used. Apply the Flyweight pattern when all of the following are true
+* an application uses a large number of objects
+* storage costs are high because of the sheer quantity of objects
+* most object state can be made extrinsic
+* many groups of objects may be replaced by relatively few shared objects once extrinsic state is removed
+* the application doesn't depend on object identity. Since flyweight objects may be shared, identity tests will return true for conceptually distinct objects.
+
 ##Proxy
 **Intent:** Provide a surrogate or placeholder for another object to control access to it.
 
