Install Maven

Now, install a JDK.

# sudo apt-get install openjdk-7-jdk

We need Maven to build ODL. Install the most recent version of Maven

# sudo mkdir -p /usr/local/apache-maven

Download the maven source code

# wget http://ftp.wayne.edu/apache/maven/maven-3/3.3.3/binaries/apache-maven-3.3.3-bin.tar.gz

Now install maven

# sudo mkdir /usr/local/apache-maven
# sudo mv apache-maven-3.3.3-bin.tar.gz /usr/local/apache-maven
# sudo tar -xzvf /usr/local/apache-maven/apache-maven-3.3.3-bin.tar.gz -C /usr/local/apache-maven/
# sudo update-alternatives --install /usr/bin/mvn mvn /usr/local/apache-maven/apache-maven-3.3.3/bin/mvn 1
# sudo update-alternatives --config mvn
# sudo apt-get install vim
# vim ~/.bashrc

Add these to your ~/.bashrc

export M2_HOME=/usr/local/apache-maven/apache-maven-3.3.3
export MAVEN_OPTS="-Xms256m -Xmx512m" # Very important to put the "m" on the end
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 # This matches sudo update-alternatives --config java

https://wiki.opendaylight.org/view/Install_On_Ubuntu_14.04