Version 5.2.0 is in development, bringing it up to date with the PMD abstract syntax tree (and thus Java 1.6), and the build will be converted to Gradle instead of Ant. I am also considering adding spell-checking for strings.
One of the most annoying things I’ve found with GNU Emacs and other programs in X is that copying/cutting doesn’t work with the X clipboard, by default.
The fix is to rebind the cut and copy shortcuts to the equivalent X clipboard functions:
(global-set-key "\M-w" 'clipboard-kill-ring-save)
(global-set-key "\C-w" 'clipboard-kill-region)