setup-jdk-7u55-linux-x64.sh

#!/bin/bash

# Configure JAVA_HOMEnn
set java_home
java_home=`sudo cat /etc/environment | grep JAVA_HOME`

if [ -z $java_home ]; then
    sudo sh -c 'echo JAVA_HOME=/opt/jdk1.7.0_55 >> /etc/environment'
fi

# Add JAVA_HOME to PATH
export JAVA_HOME=/opt/jdk1.7.0_55
java_home=`cat ~/.bashrc | grep $JAVA_HOME`

if [ -z $java_home ]; then
    echo "configuring java..."
    echo "PATH=$JAVA_HOME/bin:$PATH" >> ~/.bashrc
    cd /opt
    curl -L https://www.dropbox.com/sh/icoaf3qa2tygrfx/AAAsrxgKA1ZBbU-KQt1R2r19a/jdk-7u55-linux-x64.tar.gz | sudo tar zxv
    cd -
    echo "done."
else
    echo "java already installed."
fi