Java String Split On Non-Alphabetic Characters

I want to split a String into a String array along non-alphabetic characters. For example:

"Here is an ex@mple" => "Here", "is", "an" "ex", "mple"

I tried using the String.split(String regex) method with the regular expression "(?![\\p{Alpha}])". However this splits the string into

"Here", "_is", "_an", "_ex", "@ample"

(those underscores are to emphasize there is a space). I guess this is because the ?! regex operator is "zero-width" and is actually splitting on and removing a zero-width character preceding the non-alphabetic characters in the input string.

How can I accomplish removal of the actual non-alpha characters while I split the string? Is there a NON-zero-width negation operator?