In this Java threads primer, Cameron Laird hits some of the high (and low) points of threads as a concurrent programming technique.

Multithreading and code concurrency were once the preserve of elite programmers, but the combination of multicore processing power, complex requirements, and the readily available javax.util ...

The java.util.concurrent.Executors class provides factory methods for creating thread pools. Using a thread pool can improve performance by reusing threads rather than creating new ones for each task.