What are thread pools in Java and how do they work?

What are thread pools in Java and how do they work?

Thread pools in Java are a collection of pre-initialized threads that can be reused for executing tasks. They help manage multiple threads efficiently.

Why should I use a thread pool instead of creating new threads for each task?

Using a thread pool reduces the overhead of thread creation and destruction, improves performance, and helps manage system resources better.

Can you explain how to create a thread pool in Java?

You can create a thread pool in Java using the Executors class. For example, ExecutorService executor = Executors.newFixedThreadPool(5); creates a pool with 5 threads.

What happens when all threads in the pool are busy?

When all threads are busy, new tasks are queued until a thread becomes available. This prevents task loss and ensures orderly execution.