Java software development kit jdk

Java software development kit jdk

The JDK is a development environment for building applications using the Java programming language.

The JDK includes tools useful for developing and testing programs written in the Java programming language and running on the Java TM platform.

Important Oracle JDK License Update

The Oracle JDK License has changed for releases starting April 16, 2019.

The new Oracle Technology Network License Agreement for Oracle Java SE is substantially different from prior Oracle JDK licenses. The new license permits certain uses, such as personal use and development use, at no cost — but other uses authorized under prior Oracle JDK licenses may no longer be available. Please review the terms carefully before downloading and using this product. An FAQ is available here.

Commercial license and support is available with a low cost Java SE Subscription.

Oracle also provides the latest OpenJDK release under the open source GPL License at jdk.java.net.

WARNING: These older versions of the JRE and JDK are provided to help developers debug issues in older systems. They are not updated with the latest security patches and are not recommended for use in production.

These Java SE 8 update releases are provided under the Java SE OTN License.
Java SE 8u202 and older updates are available, under the Binary Code License (“BCL”).

For production use Oracle recommends downloading the latest JDK and JRE versions and allowing auto-update.

Only developers and Enterprise administrators should download these releases.

Downloading these releases requires an oracle.com account. If you don’t have an oracle.com account you can use the links on the top of this page to learn more about it and register for one for free.

For current Java releases, please consult the Oracle Software Download page.

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Java software development kit jdk

Thank you for downloading this release of the Java Platform, Standard Edition Development Kit (JDK). The JDK is a development environment for building applications and components using the Java programming language.

The JDK includes tools useful for developing, testing, and monitoring programs written in the Java programming language and running on the Java platform.

Installation

Installation instructions are located on the Java SE documentation site.

JDK Documentation

The on-line Java Platform, Standard Edition (Java SE) Documentation contains API specifications, feature descriptions, developer guides, reference pages for JDK tools and utilities, and links to related information. The Java SE documentation is also available in a download bundle which you can install on your machine. To obtain the documentation bundle visit the Java SE download page. For API documentation, refer to the The Java Platform, Standard Edition API Specification. This documentation provides brief descriptions of the API with an emphasis on specifications, not on code examples

Release Notes

See the Release Notes for additional information pertaining to this release. Please check the on-line release notes for the latest information as they will be updated as needed.

Compatibility

See the JDK 20 Migration Guide for a list of known compatibility issues. Every effort has been made to support programs written for previous versions of the Java platform. Although some incompatible changes were necessary, most software should migrate to the current version with no changes. Most failures to do so are considered bugs, except for a small number of cases where compatibility was deliberately broken, as described on our compatibility web page. Some compatibility-breaking changes were required to close potential security holes or to fix implementation or design bugs.

Bug Reports and Feedback

The JDK Bug Database web site lets you search for and examine existing bug reports, submit your own bug reports, and tell us which bug fixes matter most to you. To directly submit a bug or request a feature, fill out this form:

You can send feedback to the Java SE documentation team.

Please do not seek technical support through the Bug Database or our development teams. For support options, see Support and Services on Oracle Support web site.

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 Machine (JVM™), class libraries, and other files that support the execution of programs written in the Java programming language. 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 20 tools specification at https://docs.oracle.com/en/java/javase/20/docs/specs/man/index.html

Configuration files
(In the conf/ subdirectory) Files that contain user-configurable options. Files in this directory can be edited to change the JDK’s access permissions, configure security algorithms, and set the Java Cryptography Extension Policy Files which might be used to limit the JDK’s cryptographic strength.

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.

Copyright and License files
(in the legal/ subdirectory) License and copyright files for each module. Includes third party notices as .md (markdown)files.

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

Configuration

Configuring the JRE or JDK is not considered a modification for redistribution purposes.

You may configure the software by modifying the files under the conf/ directory as per the Java Platform, Standard Edition (Java SE) Documentation, including selecting one or creating your own Java Cryptography Extension policy file under conf/security/policy . Once you select or create your own you are not required to include alternative policy files.

Root CA certificates may be added to or removed from the Java SE certificate file located in lib/security/cacerts through the use of the keytool utility available in the bin/ subdirectory of the JDK.

You may update the Timezone data included in the Java Runtime Environment by using the Java Time Zone Updater tool available in the Java SE Downloads page.

Unlimited Strength Java Cryptography Extension

The default JCE policy files bundled in this Java Runtime Environment allow for «unlimited» cryptographic strengths.

For convenience, this software also contains the historic «limited» strength policy files which restricts cryptographic strengths. To use the limited strength policy, instead of the default unlimited policy, you must update the «crypto.policy» Security property (in /conf/security/java.security ) to point to the appropriate directory.

You are advised to consult your export/import control counsel or attorney to determine the exact requirements of your location, and what policy settings should be used.

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Java Downloads

JDK 20 is the latest release of Java SE Platform and JDK 17 LTS is the latest long-term support release for the Java SE platform.

JDK Development Kit 20.0.2 downloads

JDK 20 binaries are free to use in production and free to redistribute, at no cost, under the Oracle No-Fee Terms and Conditions.

JDK 20 will receive updates under these terms, until September 2023 when it will be superseded by JDK 21.

Release information

JDK Development Kit 17.0.8 downloads

JDK 17 binaries are free to use in production and free to redistribute, at no cost, under the Oracle No-Fee Terms and Conditions.

JDK 17 will receive updates under these terms, until September 2024, a year after the release of the next LTS.

Release information

GraalVM for JDK 20.0.2 downloads

GraalVM for JDK 20 binaries are free to use in production and free to redistribute, at no cost, under the GraalVM Free Terms and Conditions.

GraalVM for JDK 20 will receive updates under these terms, until September 2023 when it will be superseded by GraalVM for JDK 21.

Oracle GraalVM uses the Graal just-in-time compiler and includes the Native Image feature as optional early adopter technology.

Native Image is extensively tested and supported for use in production, but is not a conformant implementation of the Java Platform. GraalVM for JDK 20 without the Native Image feature included is available for customers at My Oracle Support.

Release information

GraalVM for JDK 17.0.8 downloads

GraalVM for JDK 17 binaries are free to use in production and free to redistribute, at no cost, under the GraalVM Free Terms and Conditions.

GraalVM for JDK 17 will receive updates under these terms, until September 2024, a year after the release of the next LTS.

Oracle GraalVM uses the Graal just-in-time compiler and includes the Native Image feature as optional early adopter technology.

Native Image is extensively tested and supported for use in production, but is not a conformant implementation of the Java Platform. GraalVM for JDK 17 without the Native Image feature included is available for customers at My Oracle Support.

Release information

Script-friendly Download URLs

The URLs listed above will remain the same for update releases to allow their use in scripts.

Protect your investment—and more

Java SE subscribers get support for JDK 17, receive updates until at least October 2029, are entitled to GraalVM Enterprise, Java Management Service, and bundled patch releases (BPRs) with fixes not yet available to nonsubscribers, and more.

Java SE subscribers have more choices

Also available for development, personal use, and to run other licensed Oracle products.

Java SE Development Kit 8u381

Java SE subscribers will receive JDK 8 updates until at least December 2030.

The Oracle JDK 8 license changed in April 2019

The Oracle Technology Network License Agreement for Oracle Java SE is substantially different from prior Oracle JDK 8 licenses. This license permits certain uses, such as personal use and development use, at no cost — but other uses authorized under prior Oracle JDK licenses may no longer be available. Please review the terms carefully before downloading and using this product. FAQs are available here.

Commercial license and support are available for a low cost with Java SE Universal Subscription.

Java SE 8u381 checksums and OL 8 GPG Keys for RPMs

JRE 8

Java SE Runtime Environment 8u381

Server JRE 8

Server JRE (Java SE Runtime Environment) 8u381

Which Java 8 package do I need?

Software developers: Java SE Development Kit (JDK) For Java developers. Includes a complete JRE plus tools for developing, debugging, and monitoring Java applications.

Running headless Linux workloads at or near your systems’ CPU or memory limits Enterprise Performance Pack brings significant memory and performance improvements including modern garbage collection algorithms, reduced memory usage and many other optimizations. Learn more

Administrators running applications on a server Server Java Runtime Environment (Server JRE). For deploying Java applications on servers. Includes tools for JVM monitoring and tools commonly required for server applications, but does not include browser integration (Java plug-in), auto-update, or an installer. Learn more

End user running Java on a desktop: Java Runtime Environment (JRE) Covers most end-users needs. Contains everything required to run Java applications on your system.

Release information

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