CentOS 7 Installation JDK 1.8

1. First check if the current Linux system installs Java

   rpm -qa | grep java

2. If the list is displayed, use the command to uninstall it

   rpm -e --nodeps 要卸载的软件名或yum -y remove 要卸载的软件名

3. Unzip the JDK to the specified directory

   tar –xvf jdk-8u172-linux-x64.tar.gz –C /usr/local/java

4. Configuring the JDK environment variables

   vim /etc/profile#在文件最底部加入以下配置信息#set java environmentexport JAVA_HOME=/usr/local/java/jdk1.8.0_172export JRE_HOME=${JAVA_HOME}/jreexport CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/libexport PATH=${JAVA_HOME}/bin:$PATH

5. Reload the/etc/profile configuration file to make it effective

   source /etc/profile

6. Finally detects if the installation configuration was successful

   java -version

CentOS 7 Installation JDK 1.8