I am writing this post for the benefit of my new Java students who have no experience with downloading and installing the JDK.
The following video clip includes the detailed instructions you need to follow in order to download and install the JDK.
In case that you did not succeed to download and install the JDK on your PC you can try the following video clip. I prepared it long time ago.
Once you complete downloading and installing the JDK you can follow the instructions in the following two video clips in order to verify that your installation was successful.