One of our developers decided he\'d dictate to other developers how people should format their source code.
Myself, I\'m a firm believer that Allman style indentation is
Well, it seems like the age-old debate is back. Unfortunately, Eclipse JDT UI does not support applying different code formatters yet.
There's bug no 45423, which is intended to resolve this. As long as that bug remains unfixed, the best workaround would be applying a formatter in a commit hook as each project is associated with it's own formatter; you cannot even choose a different formatter to apply on the file save action (Preferences -> Java -> Editor -> Save Actions). Honestly, I don't think shortcut keys would even work.
Also, it might be worth investigating the use of the Questoid Code Formatter, which appears to be the closest (or only) plugin to support your need. I haven't attempted using it; I've only read the description from Eclipse Marketplace.