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Java Explores Carrier Classes to Extend Data-Oriented Programming Beyond Records
The OpenJDK Amber project has published a new design note proposing “carrier classes” and “carrier interfaces” to extend record-style data modeling to more Java types. The proposal preserves concise state descriptions, derived methods, and pattern matching, while relaxing structural constraints that limit records.
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Java Enhances Pattern Matching with Primitive Type Support in JEP 455
JEP 455, Primitive Types in Patterns, instanceof, and switch (Preview), has been promoted from Proposed to Target to Targeted for JDK 23. This JEP, under the auspices of Project Amber, proposes to enhance pattern matching by allowing primitive type patterns in all pattern contexts, and extend instanceof and switch to work with all primitive types.