查看安装的JDK

rpm -qa |grep java

 

 

卸载

rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.242.b08-1.el7.x86_64

rpm -e --nodeps java-1.8.0-openjdk-1.8.0.242.b08-1.el7.x86_64

rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.251-2.6.21.1.el7.x86_64

rpm -e --nodeps java-1.7.0-openjdk-1.7.0.251-2.6.21.1.el7.x86_64

卸载完成