Ubuntu安装JDK

一、下载JDK

$wget http://download.oracle.com/otn-pub/java/jdk/8u111-b14/jdk-8u111-linux-x64.tar.gz?AuthParam=1482632646_ad9351bd7d6ed6a663ca89f2058221c8$mv jdk-8u111-linux-x64.tar.gz\?AuthParam\=1482632646_ad9351bd7d6ed6a663ca89f2058221c8  jdk-8u111-linux-x64.tar.gz

二、解压

$tar -zxvf jdk-8u111-linux-x64.tar.gz$sudo mkdir /opt/java$sudo mv jdk1.8.0_111 /opt/java/

三、配置环境变量

$sudo vim /etc/profile

添加

export JAVA_HOME=/opt/java/jdk1.8.0_111export JRE_HOME=${JAVA_HOME}/jre  export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib  export PATH=${JAVA_HOME}/bin:$PATH

立即更新

$source /etc/profile

四、测试

$java -version$java$javac