卸载Centos自带open-jdk

1.rpm查看安装文件 rpm -qa|grep java

2，切换到root用户，卸载

rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.75-2.5.4.2.el7_0.x86_64

rpm -e --nodeps tzdata-java-2015a-1.el7.noarch