Virtual threads in Java. Traditional Java concurrency is managed with the Thread and Runnable classes, as shown in Listing 1. Listing 1. Launching a thread with traditional Java ...

Virtual threads take the responsibility for allocating system resources out of your application code and into the JVM. Here's a first look at virtual threads in Java 21.

JDK 21's virtual threads are a major leap forward for Java's concurrency model. Previously, Java relied on OS threads, which were resource-heavy, limiting how many threads could run concurrently.