Configure jdk in Ubuntu and jdk in Ubuntu

Configure jdk in Ubuntu and jdk in Ubuntu
1. Download

• Jdk:Http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Ii. Install jdk and decompress jdk

1. Create a directory

ln0491@ln0491-virtual-machine:/$ sudo mkdir /usr/local/develoment[sudo] password for ln0491: ln0491@ln0491-virtual-machine:/$ ls /usr/local/bin  develoment  etc  games  include  lib  man  sbin  share  srcln0491@ln0491-virtual-machine:/$ 

2. Run the jdk cp file to this directory.

ln0491@ln0491-virtual-machine:/$ sudo cp /home/ln0491/Downloads/jdk-8u31-linux-x64.tar.gz /usr/local/develoment/ln0491@ln0491-virtual-machine:/$ ls /usr/local/develoment/jdk-8u31-linux-x64.tar.gzln0491@ln0491-virtual-machine:/$ 

3. Extract

sudo tar -zxvf jdk-8u31-linux-x64.tar.gz 

4. Back up the configuration file

cd /home/ln0491/
 cp .bashrc .bash_bak

5. Edit the configuration file vi. bashrc.

Add at the end

export JAVA_HOME=/usr/local/develoment/jdk1.8.0_31/

export JRE_HOME=${JAVA_HOME}/jre  export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib  export PATH=${JAVA_HOME}/bin:$PATH

Similar to Windows

export JAVA_HOME=/usr/local/develoment/jdk1.8.0_31/export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar  export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin

6. To make the change take effect immediately, run the following command on the terminal:

source .bashrc 

7. view the jdk version

ln0491@ln0491-virtual-machine:~$ java -versionjava version "1.8.0_31"Java(TM) SE Runtime Environment (build 1.8.0_31-b13)Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)ln0491@ln0491-virtual-machine:~$ 

2.2 configure Environment Variables

Global configuration: in the/etc/profile file:

Personal user configuration:/home/user name/. bashrc: only valid for this user

You can use the personal user configuration or the/etc/profile file to make all users valid.