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Java 8 Update 121 Download Mac

Java SE JDK 18

The Coffee Platform, Standard Edition xviii Development Kit (JDK eighteen) is a feature release of the Coffee SE platform. It contains new features and enhancements in many functional areas.

Last updated:

Apr ane, 2022

Contents of the JDK

This section contains a general summary of the files and directories in the JDK.

Executables

(In the bin/ subdirectory) An implementation of the Java Runtime Environment (JRE). The JRE includes a Java Virtual Motorcar (JVM™), class libraries, and other files that back up the execution of programs written in the Java programming linguistic communication. This directory also includes tools and utilities that will help you develop, execute, debug, and document programs written in the Java programming language. For further information, see the JDK 18 tools specification at https://docs.oracle.com/en/java/javase/18/docs/specs/man/alphabetize.html

Configuration files

(In the conf/ subdirectory) Files that incorporate user-configurable options. Files in this directory can exist edited to change the JDK'south access permissions, configure security algorithms, and set the Java Cryptography Extension Policy Files which might be used to limit the JDK'due south cryptographic forcefulness.

C header Files

(In the include/ subdirectory) C-language header files that support native-code programming with the Java Native Interface and the Java Virtual Machine (JVM) Debugger Interface.

Compiled Java Modules

(in the jmods/ subdirectory) Compiled modules used by jlink to create custom runtimes.

(in the legal/ subdirectory) License and copyright files for each module. Includes third political party notices every bit .dr. (markdown)files.

Boosted Libraries

(In the lib/ subdirectory) Additional form libraries and support files required past the JDK. These files are not intended for external use.

Compatibility

See the JDK 18 Migration Guide for a list of known compatibility bug. Every endeavor has been made to back up programs written for previous versions of the Coffee platform. Although some incompatible changes were necessary, most software should drift to the electric current version with no changes. Most failures to do and so are considered bugs, except for a small number of cases where compatibility was deliberately broken, every bit described on our compatibility web page. Some compatibility-breaking changes were required to close potential security holes or to set implementation or pattern bugs.

Installation

Installation instructions are located on the Java SE documentation site.

What'southward New:

Oracle today appear the availability of Java eighteen, the latest version of the world'southward number one programming language and development platform. Coffee 18 (Oracle JDK 18) delivers thousands of performance, stability, and security improvements, including nine enhancements to the platform that will farther improve developer productivity.

The latest Java Development Kit (JDK) provides updates and improvements with nine JDK Enhancement Proposals (JEPs). These include the capability to add Code Snippets in Java API Documentation (JEP 413), which simplifies the addition of sample source code in API documentation, and Unproblematic Web Server (JEP 408) for prototyping and testing. Developers can explore 2 incubating modules: the Vector API (JEP 417) and the Strange Office and Memory API (JEP 419), as well as a preview feature: Pattern Matching for Switch (JEP 420).

"The release of Java 18 demonstrates Oracle's continued delivery to provide enterprises and developers faster access to enhancements with the six-month characteristic release cadence," said Georges Saab, Vice President of Development, Java Platform Group, Oracle. "We go along to brand technical investments that amend the performance, stability, and security of the Java SE Platform implementations, as well as the Java Development Kit."

"Java developers want connected innovation with modern programming language features, developer feel enhancements, cloud managed services, and stability," said James Governor, Primary Analyst, RedMonk. "With Java'south consistent vi-month release cadence Oracle is meeting those demands, helping to keep Java relevant for modernistic applications and workloads."

Accelerating Java'south Adoption in the Cloud

Oracle recently introduced Coffee Management Service (JMS), a new Oracle Cloud Infrastructure (OCI) native service to help manage Coffee runtimes and applications on-bounds or on any cloud. JMS delivers the information needed to manage Coffee deployments across the enterprise. Java Management Service is included for OCI workloads and for Java SE Subscribers.

Java xviii is the latest release under Java'due south six-month release cadence and is the result of extensive collaboration between Oracle engineers and other members of the worldwide Java programmer customs via the OpenJDK Project and the Java Customs Procedure (JCP). This provides a steady stream of innovations while as well delivering connected performance, stability and security improvements that volition increase Java'south pervasiveness across organizations and industries of all sizes. The largest changes delivered in Java 18 are:

Updates and Improvements to Libraries

JEP 400: UTF-viii by Default—Sets UTF-8 every bit the default charset of the standard Java APIs. With this change, APIs that depend on the default charset will behave consistently across all implementations, operating systems, locales, and configurations.
JEP 408: Uncomplicated Web Server—A control-line tool and API to start a minimal web server that serves static files merely. This tool will be useful for prototyping, ad-hoc coding, and testing purposes, peculiarly in educational contexts.
JEP 416: Reimplement Core Reflection with Method Handles—Reimplements java.lang.reflect.Method, Constructor, and Field on top of java.lang.invoke method handles. Past making method handles the underlying machinery for reflection, it reduces the maintenance and development cost of both the java.lang.reflect and java.lang.invoke APIs.
JEP 418: Internet-Accost Resolution SPI—Defines a service-provider interface (SPI) for host proper noun and address resolution, so that java.internet.InetAddress can make utilize of resolvers other than the platform's congenital-in resolver.

Tools

JEP 413: JEP Code Snippets in Coffee API Documentation—Introduces the @snippet tag for JavaDoc'due south Standard Doclet to simplify the inclusion of instance source code in API documentation.

Preview and Incubators for Later on JDK Releases

JEP 417: Vector API (Third Incubator)—Provides an API for developers to reliably leverage CPU architectures that provide scalable vector extensions. This volition pb to superior performance compared to equivalent computations on non-extended processors.
JEP 419: Foreign Function and Memory API (Second Incubator)—Enables Java programs to interoperate with lawmaking and data outside of the Java runtime. Past efficiently invoking foreign functions (i.e., code exterior the JVM), and by safely accessing foreign memory (i.e., retentivity not managed past the JVM), the API enables Coffee programs to call native libraries and process native data without the brittleness and pitfalls of JNI.
JEP 420: Design Matching for Switch (Second Preview)—Enhances the Java programming language with pattern matching for switch expressions and statements, forth with extensions to the language of patterns. Extending pattern matching to switch allows an expression to be tested confronting a number of patterns, each with a specific action, so that complex information-oriented queries can be expressed concisely and safely.

Future Proofing Java Programs

JEP 421: Deprecate Finalization for Removal—Finalization remains enabled past default for now, merely can exist disabled to facilitate testing. In a future release, information technology will exist disabled past default, and in a later release, it will exist removed. Maintainers of libraries and applications that rely upon finalization should consider migrating to other resources management techniques such as the try-with-resources statement and cleaners.

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