From 3a12532da9d2b76adb960ece6d610bdc4099a57d Mon Sep 17 00:00:00 2001
From: Sergey <s.gaykov@yandex.ru>
Date: Fri, 31 Oct 2014 17:29:06 +0300
Subject: [PATCH] Added description of  LinkedList, Map & HashMap.

---
 java.html.markdown | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/java.html.markdown b/java.html.markdown
index dffc3828..478d85d6 100644
--- a/java.html.markdown
+++ b/java.html.markdown
@@ -123,9 +123,15 @@ public class LearnJava {
         // Others to check out
         // ArrayLists - Like arrays except more functionality is offered,
         //             and the size is mutable
-        // LinkedLists
-        // Maps
-        // HashMaps
+        // LinkedLists - Implementation of doubly-linked list. All of the
+        //             operations perform as could be expected for
+        //             a doubly-linked list.
+        // Maps - An objects that maps keys to values. A map cannot contain
+        //             duplicate keys; each key can map to at most one value.
+        // HashMaps - This class uses a hashtable to implement the Map interface.
+        //             This allows the execution time of basic operations,
+        //             such as get and insert element, to remain constant even
+        //             for large sets. 
 
         ///////////////////////////////////////
         // Operators