private int countMapFiles()
	{
		int counter = 0;
		
		CodeSource src = this.getClass().getProtectionDomain().getCodeSource();
		if( src != null ) {
		    URL jar = src.getLocation();
		    ZipInputStream zip;
			try {
				zip = new ZipInputStream( jar.openStream());
				ZipEntry ze = null;
				while((ze = zip.getNextEntry()) != null)
				{
					if(ze.getName().contains(worldPath))
					{
						String sub = ze.getName().substring(worldPath.length());
						if(sub.length() > 3)
						{
							counter++;
						}
					}
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		
		return counter;
	}