Episode 2 “Java 15 is Here!” with Mikael Vidstedt

David Delabassee discusses the latest Java release, Java 15, with Mikael Vidstedt, Director of JVM Development.

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Show Notes

New or updated Java language feature, Java SE API feature and JDK API

• Sealed Classes (Preview)

• Hidden Classes

• Reimplement the Legacy DatagramSocket API

• Text Blocks

• Foreign-Memory Access API (Second Incubator)

• Records (Second Preview)

• Pattern Matching for instanceof (Second Preview)

Garbage Collectors

• ZGC: A Scalable Low-Latency Garbage Collector

• Shenandoah: A Low-Pause-Time Garbage Collector

• JDK 15 G1/Parallel GC changes

• Improving G1 out-of-the-box performance

Deprecation & Removal

• Remove the Solaris and SPARC Ports

• Remove the Nashorn JavaScript Engine

Security

• Edwards-Curve Digital Signature Algorithm (EdDSA)

• Support for certificate_authorities Extension

Other Features (JDK 14 & JDK 15)

• Cgroups v2: Container awareness

• JFR Event Streaming

OpenJDK projects discussed in this episode

• ZGC

• Project Loom

• Project Panama

• Project Amber

• Project Valhalla

Additional Resources

• OpenJDK

• Oracle Java