Maybe your institution curriculum is outdated and using this version is mandatory or maybe there’s some software environment that just doesn’t work with anything else, or you just like old software.
First things first
If you stumbled upon this page the official download links probably disappeared, again, but just in case please look around NetBeans webpage or Oracle’s. The last working link was this one. I insist on getting your downloads from an official site because even if I’m swell guy, downloading random .exe and .sh from the internet is a Bad Idea™.
If that didn’t work…
Archive Downloads
I took the liberty of putting all the installation files in archive.org and obviously I didn’t modify them, you just need to trust me ;) (don’t)
(The installation file is a co-bundle with the compatible Java version)
I REPEAT, USE ONLY IF THERE ISN’T AN ALTERNATIVE
And if you have a 32bit CPU from 2006 or something, first, bless your soul, second these are the links:
I hope that helped someone, cheers!