Callable & Future

Callable and Future are vital components of Java's concurrency framework that enhance how we manage tasks in a multithreaded environment. While we’ve already explored the Executor Framework, which provides a higher-level replacement for managing threads directly, Callable and Future take things a step further, enabling us to handle tasks that return results and can throw exceptions.

Imagine you have a long-running calculation, like fetching data from a remote service or processing a large dataset. You want to kick off this task without blocking your main thread, but you also want to retrieve the result once it's ready.

This is precisely where Callable and Future shine, allowing you to write clean and efficient concurrent code.