Top 10 Most Popular Collection Classes in Java: A Guide for Java Developers
Java Collection Framework provides a set of pre-implemented classes and interfaces for handling collections of objects. These collection classes make it easy for Java developers to work with groups of objects in their code. In this article, we’ll take a look at the top 10 most popular collection classes in Java.
ArrayList
ArrayList is one of the most commonly used collection classes in Java. It is an implementation of the List interface and provides a dynamic array for storing objects.
LinkedList
LinkedList is another popular implementation of the List interface that uses a linked list to store objects. It provides fast insertion and deletion operations, making it a popular choice for many Java developers.
HashSet
HashSet is an implementation of the Set interface that uses a hash table to store objects. It provides constant-time performance for adding and removing elements, making it highly efficient.
TreeSet
TreeSet is another implementation of the Set interface that stores objects in a sorted tree structure. It provides a natural ordering for the elements, making it useful for many applications.
HashMap
HashMap is an implementation of the Map interface that uses a hash table to store key-value pairs. It provides constant-time performance for basic operations, making it highly efficient.
TreeMap
TreeMap is another implementation of the Map interface that stores key-value pairs in a sorted tree structure. It provides a natural ordering for the keys, making it useful for many applications.
EnumSet
EnumSet is a specialized implementation of the Set interface that is designed to work with enums. It provides efficient and type-safe operations for working with enum values.
LinkedHashMap
LinkedHashMap is an implementation of the Map interface that maintains the order of the keys. It provides efficient operations for both accessing and updating elements in the map.
PriorityQueue
PriorityQueue is an implementation of the Queue interface that stores elements in a priority order. It provides efficient access to the highest-priority element in the queue.
ArrayDeque
ArrayDeque is an implementation of the Deque interface that provides efficient operations for adding and removing elements from both ends of the deque.
Java Collection Framework provides a rich set of collection classes and interfaces for handling collections of objects. The top 10 collection classes discussed in this article are among the most commonly used and provide efficient solutions for various programming tasks.