Java 21

Status	In Development
Release Date	2023-09-15
EOL Date	2028-09
Bytecode Version	65.0
API Changes	Compare to 20 - 19 - 18 - 17 - 16 - 15 - 14 - 13 - 12 - 11 - 10 - 9 - 8 - 7 - 6 - 5 - 1.4 - 1.3 - 1.2 - 1.1
Documentation	Release Notes, JavaDoc
SCM	git

Data Source

This will be the next LTS Release after Java 17.

New Features

JVM

Generational ZGC (JEP 439)

Language

String Templates (Preview) Preview (JEP 430)

API

Sequenced Collections (JEP 431)
Foreign Function & Memory API (Third Preview) Preview (JEP 442)
Virtual Threads (JEP 444)

Downloads

Vendor	Product	License	Platform Downloads
Azul Systems	Zulu Builds of OpenJDK 21	GPLv2+CE	alpine-x64 linux-x86 linux-x64 windows-x86 windows-x64 macos-x64 macos-arm64
Oracle	Oracle OpenJDK 21	GPLv2+CE	linux-arm64 linux-x64 macos-arm64 macos-x64 windows-x64
SAP	SapMachine 21	GPLv2+CE	alpine-x64 linux-arm64 linux-ppc64le linux-x64 macos-arm64 macos-x64 windows-x64

Data Source

Sandbox

Instantly compile and run Java 21 snippets without a local Java installation.

import java.lang.reflect.ClassFileFormatVersion; public class Java21 { public static void main(String[] args) { var v = ClassFileFormatVersion.latest(); System.out.printf("Hello Java bytecode version %s!", v.major()); } }