Set JAVA_HOME in Ubuntu

Set JAVA_HOME in Ubuntu

Please open file
sudo vi /etc/bash.bashrc

add end line
JAVA_HOME=/usr/lib/jvm/java-1.7.0.openjdk-amd64 //path go to java jdk that you setup
export JAVA_HOME
PATH=$PATH:$JAVA_HOME/bin
export PATH

After reboot

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You can set environment variable in ubuntu that do not reboot

open file /etc/environment
sudo vi /etc/environment

add path you set environment variable
JAVA_HOME="/usr/lin/jvm/java-1.7.0.openjdk-amd64"
PATH=$PATH:$JAVA_HOME/bin

After update environment by command line
source /etc/environment

Check variable
echo $JAVA_HOME

Note: You will have problem about login when you use this way. You should use way 1 and restart PC.

Good luck to you

Install JDK 1.7 in ubuntu

To install jdk 1.7 please go to https://help.ubuntu.com/community/Java
Please click openjdk-7-jdk

You can run this link. Ubuntu will open application "Ubuntu Software Center"
http://apt.ubuntu.com/p/openjdk-7-jdk