Per the JDK 15 schedule , we are in Rampdown Phase One [1] 

Please advise if you find any issues while testing the latest Early Access builds.

• Schedule for JDK 15
• 2020/06/11 Rampdown Phase One
• 2020/07/16 Rampdown Phase Two
• 2020/08/06 Initial Release Candidate
• 2020/08/20 Final Release Candidate
• 2020/09/15 General Availability

• Features included in JDK 15:
• JEP 339: Edwards-Curve Digital Signature Algorithm (EdDSA)
• JEP 360: Sealed Classes (Preview)
• JEP 371: Hidden Classes
• JEP 372: Remove the Nashorn JavaScript Engine
• JEP 373: Reimplement the Legacy DatagramSocket API
• JEP 374: Disable and Deprecate Biased Locking
• JEP 375: Pattern Matching for instanceof (Second Preview)
• JEP 377: ZGC: A Scalable Low-Latency Garbage Collector
• JEP 378: Text Blocks
• JEP 379: Shenandoah: A Low-Pause-Time Garbage Collector
• JEP 381: Remove the Solaris and SPARC Ports
• JEP 383: Foreign-Memory Access API (Second Incubator)
• JEP 384: Records (Second Preview)
• JEP 385: Deprecate RMI Activation for Removal

JDK 15 Early Access build 28 is available at : - jdk.java.net/15/

These early-access, open-source builds are provided under the GNU General Public License, version 2, with the Classpath ExceptionRelease notes

• Release notes
  
• http://jdk.java.net/15/release-notes
• Recent fixes that might be of interest
• Build 27
• JDK-8233215: jpackage doesn't allow enough flexibility for file type binding
• JDK-8244582: Remove terminally deprecated Solaris-specific SO_FLOW_SLA socket option
• JDK-8245068: Implement Deprecation of RMI Activation
• JDK-8246770: Atomic::add() with 64 bit value fails to link on 32-bit platforms
• Reported by JaCoCo
• Build 26
• JDK-8240871: SSLEngine handshake status immediately after the handshake can be NOT_HANDSHAKING rather than FINISHED with TLSv1.3
  
• Reported by Apache Tomcat
  
• Build 25
• JDK-8206925: Support the certificate_authorities extension
• JDK-8239480: Support for CLDR version 37
• JDK-8243925: Toolkit#getScreenInsets() returns wrong value on HiDPI screens (Windows)

JDK 16 Early Access build 2 is available at : - jdk.java.net/16/

These early-access, open-source builds are provided under the GNU General Public License, version 2, with the Classpath Exception.

Survey on jinfo, jmap, jstack serviceability tools in JDK:

Rgds, Rory

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