What are Java Concurrent Collections?

Can you explain what Java concurrent collections are?

Java concurrent collections are data structures designed for concurrent access, allowing multiple threads to operate safely.

What are some examples of concurrent collections in Java?

Some examples include ConcurrentHashMap, CopyOnWriteArrayList, and BlockingQueue.

How do these collections improve performance in multi-threaded applications?

They reduce contention and provide thread-safe operations, which enhances performance in concurrent environments.

Can you give me a code example of using ConcurrentHashMap?

Sure! Here's a simple example:

ConcurrentHashMap<String, Integer> map = new ConcurrentHashMap<>();
map.put("key1", 1);
map.put("key2", 2);

map.forEach((key, value) -> System.out.println(key + " : " + value));