Narayana Tutorial

Here is list of my favorite, frequently asked Questions from Java collection framework. Almost all of these questions have appeared in Java interview at various level ranging from Junior to Senior software engineer level. ArrayList and Vector are two of most used class on java collection package What is difference between Vector and ArrayList in Java? […]

1. What is difference between List, Set and Map? List List is an ordered collection. List allows duplicate elements. List allows null elements and also store many null elements because it allows duplicate elements. The following most useful classes implementing List interface 1. ArrayList  2. LinkedList  3. Vector Set Set is unordered collection. Set does not […]