Is there a tool for the conversion of duplicate literals into final Strings/magic numbers in Java?

Is there a tool for the conversion of duplicate literals into final
Strings/magic numbers in Java?

I have some Java files that use the same String values up to 20 times
each, and I want a tool that replaces those Strings with a private static
final String STRING_TO_CAPS_AS_CONSTANT or something along those lines. If
it can also convert numbers into magic numbers, that would be great. I'm
using Eclipse but if it's a standalone tool I can still make use of it.