Java FAQ: Top Questions

Phaser in java.util.concurrent , introduced in Java 7, is a flexible synchronization barrier that allows threads to wait for phases of execution, supporting dynamic party registration.

• Parties: Number of threads synchronized, adjustable via register or bulkRegister .
• Phases: Advances when all parties arrive, tracked by phase number.
• Methods: arriveAndAwaitAdvance , arriveAndDeregister .
• Use Case: Coordinating iterative, multi-phase tasks, like simulations.
• Advantages: More flexible than CyclicBarrier .