private int compare(String vx, String vy)
{
	String[] vxL = vx.split("\\.");
	String[] vyL = vy.split("\\.");

	final int xSize = vxL.length, ySize = vyL.length, size = Math.max(xSize, ySize);

	Integer iVx, iVy;
	int i, diff;

	for (i = 0; i < size; i++)
	{
		iVx = i == xSize ? 0 : Integer.valueOf(vxL[i]);
		iVy = i == ySize ? 0 : Integer.valueOf(vyL[i]);

		if ((diff = iVx.compareTo(iVy)) != 0)
			return diff;
	}

	return 0;
}