Answer 1

You cannot download it directly from Oracle without signing in. You may be able to obtain it from another source, but I am not aware of one.
The Oracle account you create for downloading the jdk is free. Just as long as you are following the licensing agreements, obtaining a copy from Oracle should not be a problem for you.
Optionally you could look into a different jdk such as Amazon Corretto, but there could be compatibility issues.

Answer 2

If your frnds already downloaded then you can install in your pc via usb pen drive ..... You can also create it will be better for you if u will use any other software of oracle if you don't have companies name etc etc which are required for registration you can simply fill no /NA and just finish all step after that you will be able to download softwares.

Answer 3

From this, @Martin Tayler answer may help you i think...
https://www.sololearn.com/Discuss/2543954/?ref=app