查看
rpm -qa | grep java
rpm -qa | grep jdk
批量卸载
rpm -qa | grep jdk | xargs rpm -e --nodeps
rpm -qa | grep java | xargs rpm -e --nodeps
单独卸载
rpm -e --nodeps java-11-openjdk
yum list | grep java #全部
yum search java-11-openjdk #指定版本
yum install -y java-11-openjdk
通过yum方式安装默认安装在/usr/lib/jvm文件下
which Java
export JAVA_HOME=
export CLASSPATH=.:${JAVA_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
source /etc/profile
java -version
