Install JDK under Ubuntu

1. Download jdk:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html from official website
   

2. Copy the JDK package jdk-8u31-linux-x64.gz to the/USR/LIB/JVM directory, unpack: Tar zxvf jdk-8u31-linux-x64.gz

3. Configure environment variables under the ~/.bash_profile file:

   # JDK Configuration
   Export java_home=/usr/lib/jvm/jdk1.8.0_31
   Export JRE_HOME=${JAVA_HOME}/JRE
   Export Classpath=.:${java_home}/lib:${jre_home}/lib
   Export Path=${java_home}/bin: $PATH

4. To make an environment variable effective:

   SOURCE ~/.bash_profile

5. Use the Javac,java command to check if the configuration is successful, and check that the version is correct by Java-version.
   

This article is from the "It Bit Growth" blog, please make sure to keep this source http://linuxzp.blog.51cto.com/3614757/1616079

Install JDK under Ubuntu