#94 Map in Java

Check out our courses: Java Full Stack and Spring AI - https://go.telusko.com/JavaSpringAI Coupon: TELUSKO10 (10% Discount) DevOps with AWS: From Basics to Mastery : https://go.telusko.com/DevOpsAWS Coupon: TELUSKO10 (10% Discount) Master Java Spring Development : https://go.telusko.com/masterjava Coupon: TELUSKO20 (20% Discount) For More Queries WhatsApp or Call on : +919008963671 Udemy Courses: Spring: https://go.telusko.com/udemyteluskospring Java:- https://go.telusko.com/udemyteluskojava Java Spring:- https://go.telusko.com/Udemyjavaspring Java For Programmers:- https://go.telusko.com/javaProgrammers Python : https://go.telusko.com/udemyteluskopython Git : https://go.telusko.com/udemyteluskogit Docker : https://go.telusko.com/udemyteluskodocker website : https://courses.telusko.com/ In this lecture we will learn: - Map in collection - Syntax for the Map - How to work with key-value pairs in a map? - Properties of Map in Java - Difference between HashMap and HashTable #1 - Map is not an implementation or it does not extend the collection interface. But it is a part of the collection concept. - Map is a collection of key-value pairs. in this, for every value of an element, a key is associated with it. - Map itself is in an interface that supports key-value pairs. A class that implements it is called HashMap. #2 - We can add elements in a map using the put() method that accepts both the key and value of it. - We can get the value of an element by specifying its key of it in the get() method. - Keys are unique but values can be repeated. The value of a key can also be updated. - In a map, keys are in a set while values are in a list. - We can get all the keys by using the method keySet(). - We can get the value of a key by using the method get() and pass a parameter as a key in the method. - remove() method is used to delete a particular element or an entity from a map. #3 - We can also use a HashTable instead of using a HashMap. - The difference between HashMap and HashTable is that HashTable is synchronized while HashMap is normal. - If you are working with multiple threads at a time, then it is better to use a HashTable to make it synchronized. Github repo : https://github.com/navinreddy20/Javacode.git Instagram : https://www.instagram.com/navinreddyofficial/ Linkedin : https://in.linkedin.com/in/navinreddy20 Discord : https://discord.gg/UrYda98D Java:- https://bit.ly/JavaUdemyTelusko Spring:- https://bit.ly/SpringUdemyTelusko More Learning : Java :- https://bit.ly/3x6rr0N Python :- https://bit.ly/3GRc7JX Django :- https://bit.ly/3MmoJK6 JavaScript :- https://bit.ly/3tiAlHo Node JS :- https://bit.ly/3GT4liq Rest Api :-https://bit.ly/3MjhZwt Servlet :- https://bit.ly/3Q7eA7k Spring Framework :- https://bit.ly/3xi7buh Design Patterns in Java :- https://bit.ly/3MocXiq Docker :- https://bit.ly/3xjWzLA Blockchain Tutorial :- https://bit.ly/3NSbOkc Corda Tutorial:- https://bit.ly/3thbUKa Hyperledger Fabric :- https://bit.ly/38RZCRB NoSQL Tutorial :- https://bit.ly/3aJpRuc Mysql Tutorial :- https://bit.ly/3thpr4L Data Structures using Java :- https://bit.ly/3MuJa7S Git Tutorial :- https://bit.ly/3NXyCPu Donation: PayPal Id : navinreddy20 https://www.telusko.com