DavidR
16
No JAVA isn’t part of the OS, someone had to have installed it. I don’t believe it would come pre-installed on a new notebook, etc. as it is non-essential.
Some programs are JAVA based and require it, some websites use JAVA (not to be confused with JavaScript). So unless you have a program/s that require it or visit a website that requires it and you absolutely have to use them. Then JAVA isn’t required and can be uninstalled.