Design patterns are very important from interview point of view but same time they also offer learning opportunity. This list is collection of some go http://java67.blogspot.sg/2012/09/top-10-java-design-pattern-interview-question-answer.html
Both TreeSet and HashSet implements Set interface but they are quite different to each other. In order to use them effectively, knowing difference bet http://java67.blogspot.in/2012/08/difference-between-hashset-and-treeset-java.html
There are multiple ways to loop through ArrayList in Java, depending upon whether you want to loop through all elements or only some, you can either u http://java67.blogspot.com/2012/08/how-to-traverse-iterate-or-loop-ArrayList-in-java-examp...
In this article, we are comparing two of the most common Collection classes HashSet and HashMap in Java. Fundamental difference between HashSet and Ha http://java67.blogspot.com/2012/08/difference-between-hashset-and-hashmap.html
HashMap is a class from java.util package and extends AbstractMap, implements Map,Cloneable and Serializable interfaces. HashMap contains Key,Value pa http://javabynataraj.blogspot.in/2014/09/javautilhashmap-in-detail-with-program.html
Hashtable and HashMap are two of the most fundamental classes from Java Collections Framework. They both implement Map interface, earlier Hashtable us http://java67.blogspot.co.uk/2012/08/5-difference-between-hashtable-hashmap-Java-collectio...
Java beginners often confused between ConcurrentHashMap and HashMap. They tend to use CHM even when its not required and they use HashMap where its no http://java67.blogspot.com/2012/08/difference-between-hashmap-and-concurrentHashMap-java-c...
Java coding tips to sort ArrayList in increasing and decreasing Order. Order is controlled by Comparator and Comparable interfaces, there are also som http://java67.blogspot.com/2012/08/how-to-sort-arraylist-in-java-list.html
Sometime, you want to make your Collection class read only e.g. for sharing between two modules, functions or objects. Java API provides easy way to c http://java67.blogspot.com/2012/08/how-to-create-read-only-collection-in-java-example.html
Given String being widely used everywhere, we often need to convert it to different data types, e.g. You have retrieved String values from database an http://java67.blogspot.com/2012/08/how-to-create-enum-from-string-in-java.html
If you have to name two most popular collection classes then most programmers will say ArrayList and HashMap. Indeed they are the two pillars of Colle http://java67.blogspot.com/2012/08/difference-between-hashmap-and-ArrayList-in-Java.html
Though Both TreeMap and TreeSet has lot of similarity e.g. they maintains their elements in sorted order, they are completely different to each other http://java67.blogspot.com/2012/08/difference-between-treemap-and-treeset-java.html
Simple example to show, what are various way to iterate over ArrayList in Java, including Java 5 advanced foreach loop and by using Iterator. IMHO bes http://java67.blogspot.sg/2012/07/how-to-iterate-loop-traverse-list-java.html
We have different ways to iterate HashMap. Using keySet,entrySet by using Map.Entry we can do the iterations. as well as we can use for-each loops. http://javabynataraj.blogspot.in/2014/06/how-to-iterate-or-traverse-map-in-java.html
Every Java program make heavy use of Collection framework. Collection classes are used to store huge number of data or value objects e.g. Employee, Or http://java67.blogspot.sg/2012/07/sort-list-ascending-descending-order-set-arraylist.html
HashSet and TreeSet are the leaves of the same branch , in java words they both implements the Set interface. http://javahungry.blogspot.com/2014/03/difference-between-hashset-and-treeset-similarities...
The question hashmap vs concurrenthashmap is asked to check whether candidate has understanding of the concept concurrency . http://javahungry.blogspot.com/2014/02/hashmap-vs-concurrenthashmap-java-collections-inter...