I think, Checkstyle should also be able to check the
indention of files. It should be definable how many
spaces must be used for a single level of indention and
wether tabs are allowed for indention, including a
settable tabstop value.
Default should be 4 spaces indention (vimmers call that
shiftwidth) and a tab size of 8 spaces (vimmers call
that tabstop) with disallowing the use of tabs.
Changes in the defaults should also allow the following
setting (which I prefer):
A single tab for indention, forbidding the use of
spaces for indention at all. (Tab size is of no