Wow, some of you seem so knowledgeable on fields far beyond curry making, from IT systems to jet engines and playing musical instruments, for example. And many more skills.
In practice, I find relatively few sites need JavaScript to work. Right now, on this forum for example, an icon shows that JavaScript is blocked, but it doesn't seem to stop everything working perfectly well. On sites I decide to trust, I re-enable it, whilst running a reduced risk on other sites I might stumble across which could perhaps take malicious advantage of JavaScript.
As for Java, now I've removed it via Control Panel, I wonder how long it will be until some web site says I need it again.