Concurrent Collection in Java — Part 1
Concurrent collection in Java refers to a set of classes that allow multiple threads to access and modify a collection concurrently, without the need for explicit synchronization. These collections are part of the java.util.concurrent package and provide thread-safe implementations of the traditional collection interfaces like List, Set, and Map.
Before the introduction of concurrent collections, programmers had to rely on synchronized collections to ensure thread safety. Synchronized collections are collections that are accessed by multiple threads, but only one thread can access them at a time. This can lead to performance issues as threads have to wait for access to the collection.
Concurrent collections solve this problem by allowing multiple threads to access the collection concurrently, without the need for explicit synchronization. This is achieved by using advanced data structures and algorithms that are designed to support concurrent access.
The java.util.concurrent package provides a number of concurrent collection classes. Some of the most commonly used ones are:
- ConcurrentHashMap: ConcurrentHashMap is a thread-safe implementation of the Map interface. It allows multiple threads to read and write to the map concurrently without blocking each other.
