HashMap in Java | Example Tutorial | Code Below

Publicado em: 04 Abril 2022
no canal de: Javarevisited

210

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Hello hello, everybody, today in this video I will show you how to HashMap in Java. This is one of the most popular coding problems from Java interviews and also a nice exercise to learn programming techniques in Java.

HashMap is a set of key values pair. HashMap is similar to HashTable, but it is unsynchronized. It allows to store the null keys as well, but there should be only one null key object and there can be any number of null values. This class makes no guarantees as to the order of the map. To use this class and its methods, you need to import java.util.HashMap package or its superclass.

This is also a good Java programming exercise for beginners to practice coding.

More array-based problems for practice
http://javarevisited.blogspot.sg/2014...
http://javarevisited.blogspot.sg/2014...
http://java67.com/2014/11/how-to-test...
http://java67.blogspot.sg/2014/02/how...
https://javarevisited.blogspot.com/20...
/ 20-array-coding-problems-and-questions-fro...

I have also posted a GitHub link to the code.
https://github.com/LongLong2310/Javar...

Tags:
Java
HashMap
Map

#java #coding #HashMap #Map #100DaysOfCode #Exercise #StudentManagementSystem #Java

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