How to install java???

Answer 1

go to google, type in Java, select the Oracle website, search for the download button, download java, wait for the download to complete, execute the downloaded file, follow the install instructions.
congratulations, you've installed java 🎉

Answer 2

Go to:

http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html

And download the SDK for your OS. Installation is then simple as double clicking on the downloaded file.

Answer 3

thanks guys