When a virtual thread runs blocking code, which is code that forces threads to wait until an operation completes -- for example, executing an HTTP request to a web server -- the Continuation object ...

The main thread is a good example of a non-daemon thread. Code in main() will be always be executed until the end, unless a System.exit() forces the program to complete.

All in all, this is a good book — just not your typical presentation of Java threads. As far as the book’s examples go, watch out for Elvis getting caught by the UFOs.

A primer on Java 21 virtual threads with examples. Virtual threads let developers build applications that handle potentially millions of users and ensure consistent service delivery. Here's how Java ...

"So for example, in Java 21, the Windows 32-bit x86 core has been tagged for deprecation to be removed in a future release. We don't expect a resurgence of it anytime soon," he said with a smile.