You can just put $JAVA_HOME/bin in your path... or you can use `alternatives` system.
To use alternatives... so you can have multiple jdk/jre installed on the same machine and you choose among then, you will need to add them to alternatives system...
cd /path/to/java/home/bin
for f in *; do sudo update-alternatives --install /usr/bin/$f $f /usr/lib/jvm/java-8-oracle/bin/$f 0; done;
And that's all!
