Centos7 安装jdk

检查是否按照JDK及卸载

yum list installed|grep java

卸载

yum -y remove java-1.6.0-openjdk*  //表时卸载所有openjdk相关文件输入
yum -y remove tzdata-java.noarch   //卸载tzdata-java

安装JDK

1. 查看JDK软件包列表

yum list java*

2.选择要安装的包

yum install -y java-1.8.0-openjdk-devel.x86_64   

3,确认安装完成

[root@localhost ~]# java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)