The instanceof operator detects that variable superclass ‘s instance was not created from Subclass and returns false to indicate this fact. As a result, the code that performs the illegal cast ...

Pattern Matching for instanceof enhances Java with pattern matching for the instanceof operator. Java Record enhances Java with records, which are classes that act as transparent carriers for ...

Provide warnings about improper attempts to synchronize on instances of any value-based classes in the Java Platform. JEP 394: Pattern Matching for instanceof: Enhances the Java programming language ...

The instanceof operator is used to test if an object is of a given type. In turn, the introduction of Java Records cuts down on the verbosity of Java and provides a compact syntax for declaring ...

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 enha ...

These are Records - which has been in preview since Java 14, released in March 2020 - and Pattern Matching for the instanceof operator. Records are Java classes that act as transparent carriers ...