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As far as I can see, the API is entirely concerned with maintaining their database. It's possible that part of the API can be used to retrieve maps, or at least data which can be used to make a map, but I certainly don't see anything remotely resembling a Java Swing component which can display such data.
And that's natural because it would be up to third parties to write code in particular languages to make use of that map data. So check this page -- which I found by following the "Develop/Frameworks" link to see what you can find.