jdk21下载、安装详细教程(Windows、Linux、macOS)_Linux

1、官网

官网地址：openjdk

2、下载openjdk

> wget https://download.java.net/java/ga/jdk21.0.2/f2283984656d49d69e91c558476027ac/13/gpl/openjdk-21.0.2_linux-x64_bin.tar.gz
--2024-12-21 11:40:20--  https://download.java.net/java/ga/jdk21.0.2/f2283984656d49d69e91c558476027ac/13/gpl/openjdk-21.0.2_linux-x64_bin.tar.gz
resolving download.java.net (download.java.net)... 23.40.24.114
connecting to download.java.net (download.java.net)|23.40.24.114|:443... connected.
http request sent, awaiting response... 200 ok
length: 203616881 (194m) [application/x-gzip]
saving to: ‘openjdk-21.0.2_linux-x64_bin.tar.gz'
100%[=======================================================================================================================>] 203,616,881 7.44mb/s   in 24s    
2024-12-21 11:40:45 (8.18 mb/s) - ‘openjdk-21.0.2_linux-x64_bin.tar.gz' saved [203616881/203616881]

3、安装

解压

> tar zxvf openjdk-21.0.2_linux-x64_bin.tar.gz
# 复制到/user/local目录下
> mv jdk-21.0.2 /usr/local/jdk21

设置环境变量

vim /etc/profile

export java_home=/usr/local/jdk21
export path=$path:$java_home/bin

4、验证

> java -version
openjdk version "21.0.2" 2024-01-16
openjdk runtime environment (build 21.0.2+13-58)
openjdk 64-bit server vm (build 21.0.2+13-58, mixed mode, sharing)

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