Java 21 (23.9 LTS)

Java 21 will be released in September 2023. This will be an LTS release, two years after Java 17.

Status: Rampdown Phase One.

Page last updated: 2023-06-02, EA 25

Schedule:

• 2023-06-08 Rampdown Phase One

• 2023-07-20 Rampdown Phase Two

• 2023-08-10 Initial Release Candidate

• 2023-08-24 Final Release Candidate

• 2023-09-19 General Availability

Resources:

• https://jdk.java.net/21/release-notes

• https://jdk.java.net/21/

• Schedule, status and features

Selected changes targeted to Java 21

• https://openjdk.org/jeps/439

• https://openjdk.org/jeps/430

• https://openjdk.org/jeps/431

• https://openjdk.org/jeps/440

• https://openjdk.org/jeps/441

• https://openjdk.org/jeps/442

• https://openjdk.org/jeps/443

• https://openjdk.org/jeps/444

• https://openjdk.org/jeps/445

• https://openjdk.org/jeps/446

• https://openjdk.org/jeps/448

• https://openjdk.org/jeps/449

• https://openjdk.org/jeps/451

• https://openjdk.org/jeps/452

• https://openjdk.org/jeps/453

• New system property to toggle XML Signature secure validation mode (JDK-8301260)

• System.exit and Runtime.exit() Logging (JDK-8301627)

Summary of changes since Java 17 (previous LTS)

• https://openjdk.java.net/jeps/400

• https://openjdk.java.net/jeps/421

• https://openjdk.org/jeps/431

• https://openjdk.org/jeps/440

• https://openjdk.org/jeps/441

• https://openjdk.org/jeps/444