Learn how to use pattern-matching features in your Java programs, including pattern matching with switch statements, when clauses, sealed classes, and a preview of primitive type pattern matching ...

JEP 441, Pattern Matching for the switch, is completed in JDK 21, following four previews in JDKs 17-20 (JEPs 406, 420, 427, 433). It finalizes the feature, addressing feedback from previews, and ...

Since Kotlin 1.3, the array-of-strings parameter for main is not required and may be omitted if not used. If needed, it would be declared as args : Array<String>.