Formatting Java Source Code in Emacs

When you wish to reindent several lines of Java code which have been altered or moved to a different level in the parenthesis structure, you have several commands available.

C-M-q
Reindent all the lines within one parenthetical grouping (indent-sexp).

C-M-\
Reindent all lines in the region (indent-region).

C-u TAB
Shift an entire parenthetical grouping rigidly sideways so that its first line is properly indented.

M-x indent-code-rigidly
Shift all the lines in the region rigidly sideways, but do not alter lines that start inside comments and strings.

C-x h
Mark the whole current buffer