Java FAQ: Top Questions
55. What is the Exchanger class in Java?
Exchanger
in
java.util.concurrent
is a synchronization point where two threads can exchange objects, blocking until both arrive.
-
Exchange:
exchange(V x)swaps objects between threads. - Blocking: Waits for the other thread, with optional timeout.
- Use Case: Producer-consumer scenarios, genetic algorithms.
- Limitations: Only supports two threads.