Cygwin support added.

syntax_checkers/java/checkstyle.vim

@@ -27,19 +27,44 @@ function! SyntaxCheckers_java_checkstyle_IsAvailable()
     return executable('java')
 endfunction
 
+function! s:CygwinPath(path) 
+	return substitute(system("cygpath -m ".a:path), '\%x00', '', 'g')
+endfunction
+
+function! s:RemoveCarriageReturn(line)
+	return substitute(a:line, '\r', '', 'g')
+endfunction
+
+function! s:RemoveCarriageReturns(errors)
+	for error in a:errors
+		let error['text'] = s:RemoveCarriageReturn(error['text'])
+	endfor
+endfunction
+
 function! SyntaxCheckers_java_checkstyle_GetLocList()
+
+	let fname = fnameescape(expand ( '%:p:h' ) . '/' . expand ( '%:t' ))
+
+	if has('win32unix')
+		let fname =  s:CygwinPath(fname)
+	endif
+
     let makeprg = syntastic#makeprg#build({
                 \ 'exe': 'java',
                 \ 'args': '-cp ' . g:syntastic_java_checkstyle_classpath . ' com.puppycrawl.tools.checkstyle.Main -c ' . g:syntastic_java_checkstyle_conf_file,
-                \ 'fname': expand ( '%:p:h' ) . '/' . expand ( '%:t' ),
+                \ 'fname': fname,
                 \ 'tail': '2>&1',
                 \ 'subchecker': 'checkstyle' })
 
     " check style format
     let errorformat = '%f:%l:%c:\ %m,%f:%l:\ %m'
+    let errors = SyntasticMake({ 'makeprg': makeprg, 'errorformat': errorformat })
 
-    return SyntasticMake({ 'makeprg': makeprg, 'errorformat': errorformat })
+	if has('win32unix')
+		call s:RemoveCarriageReturns(errors)
+	endif
 
+	return errors
 endfunction
 
 call g:SyntasticRegistry.CreateAndRegisterChecker({