Check if world exists (even it is unloaded) ?

Hey,
I currently encounterd that .getWorld(worldName) return null, if the world is not loaded (even if it exists).

So I now use: createWorld(WorldCreator sutff) to load the world. This function loads the world if it exists and generates a new one if it doesn't.

But what I want is: Load the world, IF it exists. I don't want to create a new one, if it doesn't..
If it exists (but is unloaded, getWorld(String worldname) return null for it then) I want to load it, and if it doesn't exist I want to print some warning.

Basicly: Is there a way to check if a world exists, but is unloaded?

 

you could check for the world file using file.exists()

 

You mean the folder? good idea Can I somehow easily check, if the folder is a "world-folder" ?

 

Well, all world folders have a level.dat inside it, so you could check for that.