Linux安装JDK安装

jdk下载

https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html

copy到/usr/local

vim /etc/profile

centos

export JAVA_HOME=/usr/local/jdk1.8.0_291
export JRE_HOME=${JAVA_HOME}/jredd
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
export PATH=$PATH:${JAVA_PATH}

ubantu

export JAVA_HOME=/usr/local/jdk1.8.0_231
export JRE_HOME=${JAVA_HOME}/jre  
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib  
export PATH=${JAVA_HOME}/bin:$PATH

source /etc/profile

java -version

javac

安装完成