RockyLinux9安装Java21

1. 下载Java21

# cd /home/guanglei/Downloads/ #切换到普通用户guanglei的下载目录
# wget https://download.oracle.com/java/21/latest/jdk-21_linux-x64_bin.tar.gz # 下载Java21

2. 解压缩Java21

# tar -zxvf jdk-21_linux-x64_bin.tar.gz  -C /usr/local/

3. 配置Java21的环境变量

# vim /etc/profile

export JAVA_HOME=/usr/local/jdk-21.0.5
export PATH=$PATH:$JAVA_HOME/bin

# source /etc/profile

4. 验证Java环境

# javac -version
# java -version