Concurrency in Java

Concurrency in Java — a practical guide to Java concurrency with clear examples you can reuse in real projects.

Java Tutorial Series (72/90). Prefer one article? Read the complete Java tutorial.

Short description

Explore `ConcurrentHashMap`, futures, locks, and atomic variables for production concurrency.

ConcurrentHashMap

import java.util.concurrent.ConcurrentHashMap;

ConcurrentHashMap<String, Integer> map = new ConcurrentHashMap<>();
map.put("visits", 1);
map.merge("visits", 1, Integer::sum);