need some guidance on how to make JTable look something like this:
so far on searching i'v found nothing concrete and what i have found is scrambled between multiple .java and hundreds of lines. not readable to me.
what/where should i look into that would provide me a skeleton-like table like this?

i indeed ran across this jazz of-a-code.
so its basically either i do it by the principles shown at esus or i dont do custom header renderer at all?

You may find a few different ways to accomplish it, but basically it's going to involve steps similar to that example.