一、卸载CentOS中原有JAVA
1、查看原有JDK。rpm - qa | grep java
2、卸载JDK。sudo yum -y remove java- 1 . 6 . 0 -openjdk- 1.6.0.41 - 1.13.13.1 .el6_8.x86_64 sudo yum -y remove java- 1 . 7 . 0 -openjdk- 1.7.0.131 - 2.6.9.0 .el6_8.x86_64 sudo rpm -e --nodeps tzdata-java- 2016 j- 1 .el6.noarch
