How to Install Java's JRE and JDK with PATH Environment Variables

A tutorial on how to install Java's JRE and JDK, and how to input the PATH variables properly to use them. JRE: http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html JDK: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html