Example where a cached-thread-pool prevents immediate exit of the application

cached_threads1.java

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

public class CachedThreads {

    public static void main(String[] args) {
        final ExecutorService executor = Executors.newCachedThreadPool();
        executor.submit(() -> System.out.println("Hello World"));
    }

}