What are some examples of using thread pools in Java?

What are some examples of using thread pools in Java?

Thread pools in Java are used to manage a pool of threads for executing tasks. For example, you can use the ExecutorService to create a thread pool. Would you like to see a code example?

Yes, please provide a code example.

Here's a simple example:

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolExample {
    public static void main(String[] args) {
        ExecutorService executor = Executors.newFixedThreadPool(3);
        for (int i = 0; i < 10; i++) {
            final int taskId = i;
            executor.submit(() -> {
                System.out.println("Task " + taskId + " is running");
            });
        }
        executor.shutdown();
    }
}

This code creates a thread pool with 3 threads and submits 10 tasks to it.

What happens if I don't shut down the executor?

If you don't shut down the executor, the application may not terminate properly because the threads in the pool will keep running, potentially leading to resource leaks.

Are there different types of thread pools in Java?

Yes, Java provides several types of thread pools, such as Fixed Thread Pool, Cached Thread Pool, and Single Thread Executor, each serving different use cases.