RE: Another neat Eclipse'ism

[Drew Adams]

> > While I try to do most of my editing from Emacs, occasionally I will
> > find myself using the Eclipse Java editor.  One of the more 
> > convenient niceties, in the absence of auto-fill-mode, is having the 
> > print-margin displayed.  This is a useful feature in its own right,
> > i.e. show a 1 pixel background line in Emacs where the right margin
> > is set. Needless to say, I have not a clue how to implement it.
> 
> Not 100% the same but there is column-marker-mode available 
> (search the emacswiki).  It will highlight a given column iff the line
> is at least that long.

Yes, see this page:
http://www.emacswiki.org/cgi-bin/wiki/HighlightCurrentColumn

It also links to other pages that deal with this.