CentOS卸载自带的JDK
步骤一:查询系统是否以安装 jdk # rpm -qa|grep java # rpm -qa|grep jdk # rpm -qa|grep gcj 步骤二:卸载已安装的jdk # rpm -e --nodeps java-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.x86_64 # rpm -e --nodeps tzdata-java-2012j-1.el6.noarch # rpm -e --nodeps java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64 步骤三:验证一下是还有jdk # rpm -qa|grep java # java -version 没有内容证明已经卸载干净了 来源: https://www.cnblogs.com/yangxuyang/p/11430171.html