CentOS6.5安装JDK8

首先卸载系统自带的openJDK

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

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]#