From where we can download JDK

Answer 1

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

check this out !

Answer 2

The new boston video shows you how to install JDK.

I reccomend using IntelliJ IDEA

- similar to eclipse

- has a lot of features

https://www.sololearn.com/discuss/580291/?ref=app