Java’s thread model makes it a strong contender among concurrent languages, but multithreading has always been inherently tricky. Structured concurrency allows you to use multiple threads with ...

Java’s current implementation of Thread consumes an OS thread for each Java thread, ... There is no need to learn a new programming model to use virtual threads, the proposal states.

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.