Install JDK 8 on Raspbian Jessie Lite

Go to Java SE Development Kit 8 Downloads page (click link below).

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Check radio button accepting Oracle Binary Code License Agreement.

Click on download link for Linux ARM v6/v7 Hard Float ABI (jdk-8x-linux-arm32-vfp-hflt.tar.gz)

Finally install it.

$ sudo tar -xvf jdk-8ux-linux-arm32-vfp-hflt.tar.gz -C /opt/
$ sudo update-alternatives --install "/usr/bin/java" "java" "/opt/jdk1.8.x/bin/java" 1

Verify and your output would be something like

 $ java -version
java version "1.8.x"
Java(TM) SE Runtime Environment (build 1.8.x)