Want to write articles/new answer to be published in javapedia.net? Send in your article with your name to javatutorials2016@gmail.com!

Java / Map and its implementations

Does IdentityHashMap use hashcode method?

No. IdentityHashMap does not use hashCode method instead it uses System.identityHashCode() method. It neither use equals method instead uses == reference equality operator.

IdentityHashMap class is not a general-purpose Map implementation; it intentionally violates Map's general contract to use equals method when comparing objects.

This class is designed for use only in the rare case scenario where reference-equality semantics are required.

Invest now!!! Get Free equity stock!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

More Related questions...

List the differences between HashTable and HashMap in Java collections. Similarities between HashMap and HashTable in Java. What is a resource bundle in Java? What is the Big-O notation for operations in a Hashmap? Is HashMap faster compared to ArrayList in terms of search? Difference between HashMap and ConcurrentHashMap. Is ConcurrentHashmap good for frequently updating concurrent data structure? What are the commonly used implementations of Map in Java? Difference between Collections.synchronizedMap(Map) and ConcurrentHashMap. Difference between Collections.synchronizedMap and Hashtable. Why is ConcurrentHashMap faster than Hashtable in Java? What are the different Reference types available in Java? Which methods you need to override to use an object as key in HashMap ? Why Map does not extend the Collection interface in Java Collections Framework? How Remove method works internally in Java HashMap? Explain NavigableMap in Java collection. Explain rehashing process in Java HashMap. How null key is handled in HashMap? What is the data-structure behind the Java HashMap implementation? Why are immutable objects in HashMap so effective? Why null is not allowed in ConcurrentHashmap? Does ConcurrentHashMap allow null keys and null values ? Difference between remove() and clear() methods in HashMap. Is hashcode method invoked internally when calling get and put method in Java? How hash collision is handled in HashMap? What are the interfaces that TreeMap implements? What interfaces that HashMap implements? Big O notation for TreeMap in Java. Is TreeMap synchronized in Java? Does TreeMap allow null key? Key object constraints on a TreeMap. Does IdentityHashMap use hashcode method? Does EnumMap allow null key? What design pattern that Collections.synchronizedMap implement? Difference between HashMap and IdentityHashMap. What is a ConcurrentSkipListMap?

Show more question and Answers...

Queue and its implementations

	Interviews Questions Java Spring Hibernate Maven JUnit TOSCA BigData Angular DataStructures MongoDB MuleESB Servlet Scala	About Javapedia.net Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples. This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company.
	contact: javatutorials2016[at]gmail[dot]com
Kindly consider donating for maintaining this website. Thanks.
	Copyright © 2020, javapedia.net, all rights reserved. privacy policy.

Java / Map and its implementations

Does IdentityHashMap use hashcode method?

Comments & Discussions

Recently added...