一:安装JDK
- JDK下载网址:https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
- 找到相应的版本下载,我下载的是:JDK1.8.241
- 创建Java的目标路径文件夹
sudo mkdir /usr/lib/java
- 将下载的jdk解压到创建好的文件夹
sudo tar -C /usr/lib/java -zvxf jdk-1.8.241-linux-x64.tar.gz
- 配置环境变量
sudo gedit ~/.bashrc
添加:
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_241
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
保存并关闭,回到终端输入命令使环境变量生效:
source /etc/environment
- 配置所有用户的环境变量:
sudo gedit /etc/profile
添加:
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_241
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
保存并关闭,回到终端输入命令使环境变量生效:
source /etc/profile
- .查看是否配置成功:
java -version
配置成功的标志:
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)