We can store and retrieve key-value pairs using two popular data structures in programming: maps and hash maps. They both serve to symbolize a group of components that may be accessed by means of a special key. A collection of key-value pairs is represented using a Java interface called a Map. It is an abstract data type that offers methods for accessing, adding, and removing elements as well as a way to map keys to values. On the other hand, a HashMap is a real-world application of the Map interface. What are Maps? In computer science, a map is a ... Read More