jdk——Linux安装配置jdk

首先卸载系统自带的openJDK,如果有的话

yum remove java-1.6.0-openjdk
yum remove java-1.7.0-openjdk

上传JDK源码包，我用的jdk-8u144-linux-x64.tar.gz。解压它
wget http://download.Oracle.com/otn-pub/java/jdk/8u60-b27/jdk-8u60-linux-x64.tar.gz

tar -zxvf jdk-8u144-linux-x64.tar.gz

更改环境变量

vim /etc/profile

在最后面增加下面三句

export JAVA_HOME=/home/jdk1.8.0_144 #这里路径为自己解压的JDK的路径

export CLASSPATH=${JAVA_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

使环境变量立刻生效

source /etc/profile

最后查看java版本java -version

[root@localhost software]# java -version

java version "1.8.0_144"

Java(TM) SE Runtime Environment (build 1.8.0_144-b01)

Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

[root@localhost software]#