updated readme

Author: Ram swaroop

README.md

@@ -4,6 +4,11 @@ The repo consists of solutions to various problems invloving different data stru
 
 ## Environment
 
+### Java Version
+Java version 1.7.0_51
+Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
+Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
+
 ### IDE
 IntelliJ IDEA 14