Java 20

Java 20 was released in March 2023. It is not an LTS release and will be obsoleted at the release of Java 21 in September 2023.

Status: General Availability

Resources:

• https://jdk.java.net/20/release-notes

• http://jdk.java.net/20/

• Schedule, status and features

Selected Changes Targeted to Java 20

• JDK-8249627: Thread.suspend/resume changed to throw UnsupportedOperationException

• JDK-8284842: Support Unicode 15.0

• JDK-8289610: Thread.Stop changed to throw UnsupportedOperationException

• https://bugs.openjdk.org/browse/JDK-8294241

• https://bugs.openjdk.org/browse/JDK-8297030
  ”In this release the default idle connection timeout value for the HTTP/1.1 and HTTP/2 connections created by the java.net.http.HttpClient has been reduced from 1200 seconds to 30 seconds.”

•  JEP 429: Scoped Values (Incubator)

• JEP 432: Record Patterns (Second Preview)

• JEP 433: Pattern Matching for switch (Fourth Preview)

•  JEP 436: Virtual Threads (Second Preview)

• JEP 437: Structured Concurrency (Second Incubator)