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Free Java Update 8

Version 8 Update 251

Release date April 14, 2020

Important Oracle Java License Update

The Oracle Java 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 Java licenses. The new license permits certain uses, such as personal use and development use, at no cost -- but other uses authorized under prior Oracle Java 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

Your system currently has an older version of Java and you are receiving this update notification because a newer version has been automatically detected.

This release addresses security concerns. Oracle strongly recommends that all Java SE 8 users upgrade to this release.

Please install this free Java Update by clicking on the Update button on the Java Update window.

Installing this update will ensure that your Java applications continue to run as safely and efficiently as always.

Release Highlights

  • IANA Data 2019c
    JDK 8u251 contains IANA time zone data version 2019c. For more information, refer to Timezone Data Versions in the JRE Software.
  • New Feature: Added Support for PKCS#1 v2.2 Algorithms Including RSASSA-PSS Signature
    The SunRsaSign and SunJCE providers have been enhanced with support for more algorithms defined in PKCS#1 v2.2, such as RSASSA-PSS signature and OAEP using FIPS 180-4 digest algorithms. New constructors and methods have been added to relevant JCA/JCE classes under the and javax.crypto.spec packages for supporting additional RSASSA-PSS parameters.
    See JDK-8146293
  • Other notes: WebEngine Limits JavaScript Method Calls for Certain Classes
    JavaScript programs that are run in the context of a web page loaded by WebEngine can communicate with Java objects passed from the application to the JavaScript program. JavaScript programs that reference java.lang.Class objects are now limited to the following methods:

    No methods can be called on the following classes:


    JDK-8236798 (not public)
  • Other notes: New Oracle Specific JDK 8 Updates System Property to Fallback to Legacy Base64 Encoding Format
    Oracle JDK 8u231 upgraded the Apache Santuario libraries to v2.1.3. This upgrade introduced an issue where XML signature using Base64 encoding resulted in appending &#xd or &#13 to the encoded output. This behavioral change was made in the Apache Santuario codebase to comply with RFC 2045. The Santuario team has adopted a position of keeping their libraries compliant with RFC 2045.
    See JDK-8236645

» More information on 8u251

Bug Fixes

This release contains fixes for security vulnerabilities. For more information, see the Oracle Java SE Critical Patch Update Advisory.

For a list of bug fixes included in this release, see JDK 8u251 Bug Fixes page.

Java Expiration Date

The JRE expires whenever a new release with security vulnerability fixes becomes available. Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Third Party Bulletin. This JRE (version 8u251) will expire with the release of the next critical patch update scheduled for July 14, 2020.

For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 8u251) on August 14, 2020. After either condition is met (new release becoming available or expiration date reached), Java will provide additional warnings and reminders to users to update to the newer version.

Related Information

» More information on Java Update
» Detailed technical information about this release can be found in the Java 8 Release Notes.
» Previous release changes FAQ

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