6 · Advanced · lesson 35 of 41

ExecutorService

Thread pools — the right way to run many tasks.

Java

ExecutorService pool = Executors.newFixedThreadPool(4);

Future<Integer> f = pool.submit(() -> heavyWork());
Integer result = f.get();     // blocks until done

pool.shutdown();

Key takeaways

✓Don't hand-roll threads — submit tasks to a pool.
✓Always shutdown() the executor.

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