JDK 19: The New Features in Java 19
upstart writes:
JDK 19: The new features in Java 19:
Java Development Kit 19, a non-LTS (long-term support) release of standard Java, arrives today as a production release.
Seven features target the release including structured concurrency, record patterns, a preview of a foreign function and memory API, and support for the open source Linux/RISC-V instruction set architecture (ISA). All features but the Linux/RISC-V capability are either in preview or incubator phases.
JDK 19 follows the March 22 arrival of JDK 18. Standard Java has been on a six-month release cadence for five years, with JDK 19 being the tenth six-month release.
JDK 19 is available at oracle.com. The production release follows two release candidates and two rampdown phases, dating back to June. The JDK 19 features include:
- Structured concurrency, in an incubator phase, is intended to simplify multithreaded programming through a structured concurrency API. [...]
- A preview of record patterns, to deconstruct record values. Record patterns and type patterns can be nested to enable a declarative, powerful, and composable form of data navigation and processing. [...]
- A preview of a foreign function and memory API, which would introduce an API by which Java programs can interoperate with code and data outside the Java runtime. [...]
- A preview of virtual threads, which are lightweight threads that dramatically reduce the effort of writing, maintaining, and observing high-throughput, concurrent applications. [...]
- A third preview of pattern matching for switch expressions and statements, extending pattern matching to switch, to allow an expression to be tested against a number of patterns, each with a specific action, so complex data-oriented queries can be expressed concisely and safely. [...]
- A fourth incubation of a vector API that would express vector computations that reliably compile at runtime to optimal vector instructions on supported CPU architectures, thus achieving performance superior to equivalent scalar computations. [...]
- With the Linux/RISC-V port, Java would gain support for a hardware instruction set that is already supported by a wide range of language toolchains. [...]
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