Update README.md

Author: rampatra

README.md

@@ -1,20 +1,20 @@
 # Algorithms and Data Structures in Java
 
-The repo consists of solutions to numerous problems using different data structures and algorithms, where all solutions are coded purely in Java. It also contains solutions to HackerRank problems which I have solved so far.
+The repo consists of solutions to numerous problems using different data structures and algorithms, all coded in Java. It also contains solutions to HackerRank problems which I have solved so far and also questions from Cracking the Coding Interview Book _(6th Edition)_.
 
 You can also refer my [Java Notes](http://java.ramswaroop.me) for a quick refresh on the Java concepts.
 
 ## 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)  
+Java version 1.8.0_172
+Java(TM) SE Runtime Environment (build 1.8.0_172-b11)
+Java HotSpot(TM) 64-Bit Server VM (build 25.172-b11, mixed mode) 
 
 ### IDE
-IntelliJ IDEA 14
+IntelliJ IDEA 2018.1.4 (Ultimate Edition)
 
 ### Machine
 MacBook Pro  
-2.6 GHz Intel Core i5   
-8 GB 1600 MHz DDR3
+2.5 GHz Intel Core i7   
+16 GB 1600 MHz DDR3