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.

Java virtual threads are much lighter and more efficient than traditional operating system threads, and excel at handling blocking operations. Unfortunately, despite their advantages, virtual threads ...

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.

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.