openjdk
https://openjdk.org/projects/jdk/
windows install openjdk
https://github.com/ojdkbuild/ojdkbuild
winget install Microsoft.OpenJDK.21
linux
https://github.com/ojdkbuild/contrib_jdk8u-ci
## archlinux install openjdk
# openjdk
sudo pacman -S jdk-openjdk
sudo pacman -S openjdk-src
# jdk8
sudo pacman -S jdk8-openjdk openjdk8-src
sudo pacman -S jdk11-openjdk
# 查看已经安装的 jdk
archlinux-java status
sudo archlinux-java set java-11-openjdk
sudo pacman -S jdk17-openjdk openjdk17-src
切换 jdk 版本
archlinux-java help
archlinux-java status
archlinux-java set java-14-openjdk
查看当前 java 版本
java -version
sudo archlinux-java status
ubuntu openjdk
# 安装默认版本, 最新的 TLS 版本
sudo apt update
sudo apt install default-jdk
# 验证安装
java -version
javac -version
sudo apt install openjdk-21-jdk
sudo apt install openjdk-8-jdk
sudo apt install openjdk-8-source
# openjdk 17, depends libc6 (>= 2.33)
sudo sudo apt update && sudo apt install openjdk-17-jdk openjdk-17-source
# 默认目录
ls -l /usr/lib/jvm/
# 查看
sudo update-java-alternatives -l
# 切换 jdk
sudo update-alternatives --config java
手动安装 openjdk
download jdk
adoptium
https://adoptium.net/temurin/releases
jdk 8
https://mirrors.tuna.tsinghua.edu.cn/Adoptium/8/jdk/x64/windows/
https://mirrors.tuna.tsinghua.edu.cn/Adoptium/8/jdk/x64/linux
open a terminal.
sh jdk-6u25-linux-i586.bin
sudo gedit /etc/environment
add /***/jdk1.6.0_25/bin to path
add …
JAVA_HOME=/***/jdk1.6.0_25
CLASSPATH=.:/***/jdk1.6.0_25/lib
sudo update-alternatives -install /usr/bin/java java /***/jdk1.6.0_25/bin/java 300
sudo update-alternatives -install /usr/bin/javac javac /***/jdk1.6.0_25/bin/javac 300
udo update-alternatives -config java
Eclipse Temurin, Adoptium
Eclipse Temurin
Eclipse Temurin 项目是最初 AdoptOpenJDK 任务的延续。Eclipse Temurin 是 Eclipse 基金会中的 Adoptium 项目所构建的二进制文件。Adoptium 还支持和推广由 Adoptium 工作组成员组织提供的版本，Adoptium 工作组成员组织战略成员包括阿里云、Azul、华为、Karakun、微软和 Red Hat。
Eclipse Temurin 是开源许可的运行时二进制文件，与其 AdoptOpenJDK 前身不同，是经过 Java SE TCK 测试并兼容在整个 Java 生态系统中通用。
Eclipse Adaptium 还提供了工件，包括作为代码的开源基础设施、全面的持续集成构建和测试场，以及大量的质量保证测试。
Azul 和 IBM 为 Eclipse Temurin 二进制文件提供商业支持。
https://wiki.archlinux.org/index.php/java
https://archlinux.org/packages/extra/x86_64/jdk8-openjdk/
redhat build of openjdk
https://developers.redhat.com/products/openjdk/download?sc_cid=701f2000000RWTnAAO
jvm specs
https://docs.oracle.com/javase/specs/index.html
jdk source code
https://github.com/openjdk/jdk
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/libatk-wrapper.so
Java ATK Wrapper is a implementation of ATK by using JNI technic. It converts Java Swing events into ATK events, and sends these events to ATK-Bridge. https://developer.gnome.org/accessibility-devel-guide/stable/dev-start-5.html.zh_CN
https://blog.csdn.net/oschina_40188932/article/details/78833754
openjdk archive
macos openjdk
brew install openjdk