Modern applications might need to support millions of users, but OS threading limits present a problem. Here's how Java 21 virtual threads solve it.

Need to add multiple values to a key in a Java HashMap but can't figure out how to do it? Here are three examples of how to solve the multiple values per key problem in Java.

Explore Java's latest feature, Pattern Matching for Switch. Understand its enhancements, including support for any reference type, new case labels, guarded patterns, and more!