【Java】JDK安装和配置

Oracle JDK

安装

• 解压安装包

cd /usr/local

tar -zxvf jdk-8u261-linux-x64.tar.gz

• 创建软链接jdk

ln -s jdk1.8.0_261 jdk

配置

• 修改环境变量

vim /etc/profile

export JAVA_HOME=/usr/local/jdk
export JRE_HOME=/usr/local/jdk/jre
export CLASSPATH=.:%JAVA_HOME%/lib/dt.jar:%JAVA_HOME%/lib/tools.jar
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

source /etc/profile

• 验证是否安装成功

java -version

java version "1.8.0_261"
Java(TM) SE Runtime Environment (build 1.8.0_261-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.261-b13, mixed mode)