Add Java home to PATH

If you have multiple jdks and you want to use a specific version over another, make sure to prepend that version to your PATH.

export PATH="/usr/java/jdk1.6.0_18/bin/:$PATH"

note: This will only set it for your current session, it will reset to its original value once you restart your shell. If you want to set it permanently, use setx -m PATH "..."