Centos安装jdk8

安装的是免费OpenJDK：Home | Adoptium

vim /etc/profile

export JAVA_HOME=/usr/local/jdk8u442-b06
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/too
ls.jar
export PATH=${JAVA_HOME}/bin:$PATH
    
source /etc/profile
java -version