JDK 安装

存在OpenJDK 和 Oracle Java 2个版本。

Step 1 下载

cd ~wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" \"http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.rpm"

Step 2 安装

sudo yum localinstall jdk-8u144-linux-x64.rpm

Step 3 检测版本

java -version

Step 4 多个版本切换

alternatives --config java

Step 5 设置JAVA_HOME

• Setup JAVA_HOME Variable

export JAVA_HOME=/opt/jdk1.8.0_141

• Setup JRE_HOME Variable

export JRE_HOME=/opt/jdk1.8.0_141/jre

• Setup PATH Variable

export PATH=$PATH:/opt/jdk1.8.0_141/bin:/opt/jdk1.8.0_141/jre/bin

参考：digitalocean

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