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.

Unfortunately, Java applications taking advantage of multiple threads can at times run into the dreaded deadlock condition. Fortunately, the Java Platform makes deadlock detection relatively easy.

To unlock the power of virtual threads in Java, developers must understand how they work versus traditional threads and how to avoid the problem of pinning.

The facility java provides for this is via Pipes.<BR><BR>Take a look at the java.io.PipedInputStream and PipedOutputStream classes.

At Oracle CloudWorld, the Java team unveiled a list of key new features in Java 21, which went into general availability last week.