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|Interview Questions and Answers|
|Ans. The Java collections framework (JCF) is a set of classes and interfaces that implement commonly reusable collection data structures. Although referred to as a framework, it works in a manner of a library. The JCF provides both interfaces that define various collections and classes that implement them.|
Sample Code for Map
Sample Code for HashMap
Sample Code for Treemap
Sample Code for set
Sample Code for hashset
Sample Code for treeset
Sample Code for list
Sample Code for arraylist
Sample Code for linkedlist
Sample Code for queue
Sample Code for priorityqueue
Sample Code for concurrenthashmap
Sample Code for vector
Sample Code for stack
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|What is the difference between ArrayList and LinkedList ?|
|If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ?|
|Difference between HashMap and Hashtable?|
|Difference between TreeMap and HashMap ?|
|Can you provide some implementation of a Dictionary having large number of words ?|
|Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?|
|What is a ConcurrentHashMap ?|
| Collections.sort can only be performed on ..|
d. Any Collection implementation
|How is Hashmap internally implemented in Java ?|
| What is the difference between List, Set and Map ?|
What are the different Java Collections Interfaces ?