Java / Collections

Explain get(keyObj) method of HashMap/Hashtable.

hashcode() method of the Key object being passed as an argument to the get method finds the unique bucket location in backing array and the value from the entry(Key, value) is returned.

one hashcode() (one entry) corresponds to one bucket location.

More Related questions...

How do you initialize an ArrayList? How to reverse the List using Collections? What is Java Collections Framework? How do I parse an URL String into Name-Value Collection? Explain get(keyObj) method of HashMap/Hashtable. How get() method will handle if two keys have the same hashcode? What get() method return if the key does not exist at HashMap? Advantages of using Collections Framework. Root interface in collection hierarchy. Where does the Java Collection framework packaged? How do I synchronize a ArrayList In Java? Does HashMap get() method work with value object's hashcode? What is Entry? Difference between poll() and remove() method of Queue interface. Difference between fail-fast and fail-safe Iterators. Which collection classes are synchronized or thread-safe ? What are the core Collection interfaces? What is the difference between List and Set ? What is the difference between Map and Set ? What are the classes that implements List and Set interface ? What is an iterator? What is the difference between Iterator and Enumeration ? Which design pattern implemented by Iterator? What are the methods to be overridden to use an object type as key in HashMap ? What is the difference between Queue and Stack? Convert the array of strings into a list. What is the difference between HashMap and Hashtable? What is the difference between peek(),poll() and remove() method of the Queue interface? What is the difference between Iterator and ListIterator? What is the difference between Array and ArrayList in Java? Does HashSet ignore String case when contains() method is invoked in Java? How do you swap two elements in a list using Collections class API? What is IdentityHashmap in Java? What are the similarities between HashSet, LinkedHashSet and TreeSet In Java? List the differences between LinkedList and ArrayList in Java. List out the similarities between ArrayList and LinkedList in Java. Java: Which algorithm does Collections.sort() use? Why Collection does not extend Cloneable and Serializable interfaces ? Difference between Comparable and Comparator interface. Difference between Synchronized Collection and Concurrent Collection. What is BlockingQueue in Java collections? Difference between the add and offer methods in a Queue in Java. How do you filter a Java Collection? How to avoid ConcurrentModificationException when removing while Iterating through a Collection? What is the difference between Streams and Collections in Java 8? What is predicate in Java 8? Advantages of using Lambda expression. Difference between Predicate and function in Java 8. Difference between IntStream.rangeClosed() and range() in Java 8. What is the main objective of streaming and lambda in Java8? How are the parallel streams implemented in Java8? Explain Supplier interface in Java8. What is BooleanSupplier interface in Java8? Why do we need to use Java 8 Stream API? The default capacity of Collection Elements: ArrayList, Vector, HashSet, Hashtable, and HashMap. How Fail Fast Iterator works internally?

Show more question and Answers...

List and its implementations

Comments & Discussions

OOPS Concepts and its implementation in Java 19 Inheritance 29 JDK, JRE, JVM, JIT 69 Java Identifiers 4 Object, Class and Package 44 Variable 9 Local Variables 6 Instance Variables (Non Static Variables) 3 Class Variables (Static Variables) 13 Package 10 Operators 9 Modifiers 29 Data types 10 Methods 39 Control Statements 14 Access Modifiers 5 Constructor 38 Interface 46 Abstract Class 19 Enum 20 Arrays 20 Strings 32 Using String 29 Exception 55 Collections 56 List and its implementations 22 Map and its implementations 39 Set and its implementations 23 Queue and its implementations 4 Regular expressions 3 Design Patterns 75 Generics 20 Casting 5 volatile 13 Java ThreadLocal 10 Java Multithreading 113 Java Multithreading part II 18 final keyword 13 static keyword 16 Java Transactions (JTA) 21 Concurrent collections 55 Java Serialization 36 JDBC 53 JNDI 17 RMI 6 JAXB 10 JMS 45 JMX 9 Servlet Interview Questions 16 log4j 19 Annotations 10 XML 14 Garbage collection 31 Programs 8 JVM 4 Java8 streams 34 JavaFX 6 Autosys Interview questions 21 The Java Virtual Machine: How and What Is It Used For? Java 11 10 Java 12 5 Top Errors You Should Avoid when Studying Programming Java 17 1 JPMS 6 Java Record Keyword 4 MapStruct Java Interview questions Java 21 Interview Questions 46 Lombok Interview questions 48 Quarkus Interview questions 50

Recently added questions

What is parameter binding in MyBatis? How do you integrate MyBatis with Spring Boot? What is a SqlSessionFactory in MyBatis? How do you write a basic SELECT statement in MyBatis? What is the difference between #{} and ${} in MyBatis? What is MyBatis-Spring? What is MyBatis? What is the difference between MyBatis and Hibernate? What is a Mapper interface in MyBatis? What is a Mapper XML file? What is result mapping? What are the supported statement types in MyBatis? What is a resultMap? How do you configure a data source in MyBatis? What is the mybatis-config.xml file used for? Explain how pagination is typically implemented in MyBatis? What is the purpose of MyBatis? What are the key features of MyBatis? What is a SqlSession in MyBatis? What is dynamic SQL in MyBatis?

	Interviews Questions Java Spring Hibernate DevOps Testing API BigData Web Erlang AI Database Integration Cloud Python Scala Tools Golang SAP	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. Follow Javapedia updates
	contact: javatutorials2016[at]gmail[dot]com
Kindly consider donating for maintaining this website. Thanks.
	Copyright © 2026, javapedia.net, all rights reserved. Privacy Policy · Terms of Service.