Virtual threads, revealed in Java's Project Loom and generally available with the Java 21 LTS, promise unparalleled scalability, simplified asynchronous coding and more efficient resource utilization.

Java historically has dealt with this problem partly through a powerful concurrency API and thread pooling. Now Java developers are abuzz about virtual threads, a feature introduced in Java 21. Java ...

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.

Overall, Kotlin’s concurrency support is impressive and well thought out. It’s not hard to understand why the language is a popular alternative to Java.