Setting JAVA_HOME correctly

JAVA_HOME

#Setting up JAVA_HOME correctly
###Intro:
Spark and maven are not happy with JAVA_HOME set to usr/bin/java, so we need to setup to the real path.

In terminal (each line uses the result of the previous one as last parameter, replace as required):
```
which java
ls -alh /usr/bin/java
ls -alh /etc/alternatives/java
```
Now in your ~/.bashrc
```
export JAVA_HOME=/usr/lib/jvm/java-8-oracle
export PATH=$PATH:$JAVA_HOME
```

###Log
```
$ which java
/usr/bin/java

$ ls -alh /usr/bin/java
lrwxrwxrwx 1 root root 22 Jul 21  2014 /usr/bin/java -> /etc/alternatives/java

$ ls -alh /etc/alternatives/java
lrwxrwxrwx 1 root root 39 Jul 23  2014 /etc/alternatives/java -> /usr/lib/jvm/java-8-oracle
```