How can I display map data (prefererably using OpenStreetMaps) in my java application?

I currently have an Android app that downloads map data from tile.openstreetmap.org. I then want it to be able to communicate with a server and have them share the same map markers. The so开发者_JAVA百科lution I am using for Android does not really port over to standard Java and I was wondering:

Is there a relatively easy way to display the same map data on my desktop using java?

Currently the maps are in .mgm files using a 1-tile-per-file format. If there are any questions I can answer to make answering my question easier, please let me know. Thanks ahead of time.

EDIT:

My fault... I forgot to mention that I need to be able to have the map data downloaded in some way because I cannot guarantee a consistent internet connection to my desktop (yes, I realize how strange that sounds), however, I need to guarantee that map data can be provided.

Edit 2:

I think a lot of this is taken care of by updated and new APIs.

Have you tried with JXMapViewer? It should work with OpenStreetMap data.

JMapViewer was recently updated and works nicely.

Last Changed Date: 2011-08-10 10:50:46 -0400 (Wed, 10 Aug 2011)

This has now been answered other places on Stack Overflow:

OpenStreetMap - java library to handle offline map

The basic premise is to setup a local tileserver with pre-rendered OSM tiles.