Hi David & Richard,

OpenJDK 15 EA build 21 is now available at http://jdk.java.net/15

• These early-access , open-source builds are provided under the
  
• GNU General Public License, version 2, with the Classpath Exception.
• Features
• Integrated in JDK 15
• JEP 371: Hidden Classes
• JEP 372: Remove the Nashorn JavaScript Engine
  
• JEP 377: ZGC: A Scalable Low-Latency Garbage Collector
• JEP 378: Text Blocks
• JEPs targeted to JDK 15
  
• JEP 379: Shenandoah: A Low-Pause-Time Garbage Collector
  
• Changes in recent builds that maybe of interest:
  
• build 21
  
• JDK-8242848: Improve performance of InflaterOutputStream.write()
• JDK-8243574: java.lang.invoke.InvokerBytecodeGenerator.ClassData should be package-private
• Reported by JaCoCo
• build 20
• JDK-8237890: DatagramPacket::getSocketAddress doesn't specify what happens if address or port are not set [1]
  
• JDK-8228991: Obsolete -XX:UseAdaptiveGCBoundary [1]
• JDK-8242141: New System Properties to configure the TLS signature schemes [1]
  
• JDK-8172404: Tools should warn if weak algorithms are used before restricting them
• JDK-8238195: Lookup::defineClass should link the class to match the specification
• JDK-8238358: Implementation of JEP 371: Hidden Classes
• JDK-8241749: Remove the Nashorn JavaScript Engine
• JDK-8242260: Add forRemoval=true to already deprecated ContentSigner
• JDK-8242008: SSLSession inconsistencies
• Reported by Netty
• build 19
• JDK-8239594: The java.net.HttpClient does not override the protocols specified in the SSLContext default parameters [1]
  
• JDK-8172680: SunJCE provider now supports SHA-3 based Hmac algorithms
• JDK-8237474: Default SSLEngine should create in server role
• JDK-8240877: NPE at javax.swing.text.html.FormView.appendBuffer with null option values
  
• reported by JOSM  

Project Loom Early-Access Builds - Build 15-loom+5-125 (2020/4/17)

• These builds are intended for developers looking to "kick the tyres" and provide feedback on using the API or by sending bug reports. Warning: This build is based on an incomplete version of JDK 15.

• These early-access , open-source builds are provided under the
  
• GNU General Public License, version 2, with the Classpath Exception.
• Please send feedback via e-mail to loom-dev@openjdk.java.net. To send e-mail to this address you must first subscribe to the mailing list.

Rgds,Rory

[1] http://jdk.java.net/15/release-notes

-- 
Rgds, Rory O'Donnell
Quality Engineering Manager
Oracle EMEA, Dublin, Ireland