Claiming chunk attached to current chunk

I was wondering, how I could pull off the town claim or factions claiming system where you walk and claim that chunk as long as the chunk is attached to one of the sides of the current chunk?

 

http://jd.bukkit.org/rb/doxygen/d6/d90/interfaceorg_1_1bukkit_1_1Chunk.html I'm guessing using the chunk.getX() and chunk.getZ() you can compare to other chunks, and see if they are next to each other.

 

The Fancy Whale I am not sure how to use the x and z to ensure it is connected to the chunk

 

xXMaTTHDXx subtract the x's, take the absolute. Subtract the z's, take the absolute. Add both together. If the value is 0, it's the same chunk. If the value is 1, it's one of the 4 adjacent chunks. More cannot be guaranteed without the use of if statements.

 

fireblast709, I am a bit confused on how to do this though, could you show some pusedo code? Just cause I am a bit confused.