卸载OpenJDK

查看系统安装的java版本

[root@ycyzharry opt]# java -version
openjdk version "1.8.0_292"
OpenJDK Runtime Environment (build 1.8.0_292-b10)
OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)

查看系统安装了哪些OpenJDK

[root@ycyzharry opt]# rpm -qa | grep jdk
java-1.8.0-openjdk-headless-1.8.0.292.b10-1.el7_9.x86_64
java-1.8.0-openjdk-1.8.0.292.b10-1.el7_9.x86_64

卸载OpenJDK

[root@ycyzharry opt]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.292.b10-1.el7_9.x86_64
[root@ycyzharry opt]# rpm -e --nodeps java-1.8.0-openjdk-1.8.0.292.b10-1.el7_9.x86_64

验证卸载是否完成

[root@ycyzharry opt]# rpm -qa |grep jdk
copy-jdk-configs-3.3-10.el7_5.noarch
[root@ycyzharry opt]# java -version
-bash: /bin/java: No such file or directory

安装JDK可以参考如下

java环境变量配置