Java SE 14 (March 2020) introduced a limited form of pattern matching as a preview feature, which becomes a permanent feature in Java SE 16 (March 2021).

JEP 443, Unnamed Patterns and Variables (Preview), has been Completed from Targeted status for JDK 21. This preview JEP proposes to "enhance the language with unnamed patterns, which match a record co ...

The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ...