After his schooling, he became a pupil of Piloty whilst living in Munich, Germany. He then went on to exhibit his paintings from 1863, in both Munich and Vienna. One of his paintings can be seen in the museum in Munich.

Johann Hofner died on 29 June 1913, in Munich.

http://www.donaukurier.de/lokales/schrobenhausen/art603,1761310

I am an art researcher, so it may interest you to know how I located this info for you. A trick I often use for a very tricky artist is to take that artist's name along with the word "memorial," then google a search. Cemeteries often post memorial statements online, even quite old ones, which usually include significant vital personal information. Usually you have to go through several pages of search material to find anything useful. In this case, I did not find any memorial material, but did find a helpful site for another artist, a friend of Hofman's that listed his original college of study, the Akademie de Bildenden Künste, in Munich. So, I then ran a search using his name and that of the academy, and a wealth of German sites appeared concerning he, his life, and his work. If you run such a search yourself, you, too, will find all these further sites, many of which have a translation program.

I only hope this helps you in some small way!

Linda T.