I don't believe there is anything like that. There is split screen on console however (info here). In order for him to play with you on java version though, he will need his own account (and email). You could use any old emails you have access to to set up his minecraft account though to avoid setting up a new one (the email can be changed later at mojang's website. Here is the link).
Also, windows 10 edition does not seem to have split screen capability, despite how convenient it would be here.