You actually wouldn't. You might
once - but then you're counting "installing the IDE" as "using the IDE every time" and that just doesn't happen. You're also using a LOT of hyperbole, to the point where you're just plain wrong.
A few minutes for the IDE to open? Nah, bruh. Couple of seconds, and since you leave the IDE open for a while, that startup time gets to be ignored. You aren't starting the IDE, exiting the IDE, running your code, starting your IDE, exiting the IDE, running your code.
You're starting the IDE, writing, running, debugging, reaching some kind of finishing point, THEN shutting down the IDE... maybe. A lot of programmers have their IDEs open 24/7. Over a month's runtime, those three seconds opening the IDE seem (and are) irrelevant.
Billion GUI windows? Nah, bruh. Even IDEA, which has a lot of windows on initial installation, has only a few... and they're all for a point, if you, like, read them.
A second to process your keystroke? Also nonsense. Even a raspi can process faster than that. Unless you're deliberately overloading your machine, I suppose. That's always an option... but a counter to that is "... don't?"
And useless toolbars? Useless to whom? The IDEs you'll find in Java are battle-tested. The useless toolbars are hidden these days. You might not know what they're useful for, but that's not the same as being useless. If you write Java, you'll learn how useful they are.
And as a bonus, you'd ... did you say.. have to pay more money than your dorm costs? ... why?
Java has three major IDEs: IDEA, Eclipse, and Netbeans. (If you want to exclude netbeans, join the crowd. Everyone else excludes it, too.) All three have free editions that cost you ... like... literally... nothing. Zip. Nada. Zilch.
Try again.