Guarded Pattern in Java 21 switch-case Core Java java Java 17 Java 21 by devs5003 - December 16, 2024December 25, 20240 Guarded Pattern in Java: A Comprehensive Guide with Examples Java has undergone significant evolution over the years, and with the introduction of Java 17, several advanced features were added to the language. One such feature is the "Guarded Pattern" in enhanced switch expressions and pattern matching. This article explores the guarded pattern, its use cases, and practical examples to demonstrate its power and utility. The Guarded Pattern was introduced as a preview feature in Java 17 under JEP 406 for adding conditional logic directly in switch case labels. It was finalized in Java 21, making it a stable feature for developers. What is a Guarded Pattern? A guarded pattern in Java is a conditional pattern that allows us to define additional constraints on pattern matching.