$47.$ Location Detection

ALL

Implement a prototype service to detect a user's location based on their IP addresses.

The IP addresses belonging to the IPv$4$ space are conventionally represented by four octets, $"$a$.$b$.$c$.$d$"$

$-$ such as $127\mathrm{.}10\mathrm{.}20\mathrm{.}30.$ To keep it simple, these IP addresses are classified into $5$ different regions indexed from $1$ to $5$ on the basis of the order of the bits in the first octet.

Broadly, the IP Addresses are categorized as follows:

$1.0\mathrm{.}0\mathrm{.}0\mathrm{.}0-127\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$2.128\mathrm{.}0\mathrm{.}0\mathrm{.}0-191\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$3.192\mathrm{.}0\mathrm{.}0\mathrm{.}0-223\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$4.224\mathrm{.}0\mathrm{.}0\mathrm{.}0-239\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$5.240\mathrm{.}0\mathrm{.}0\mathrm{.}0-255\mathrm{.}255\mathrm{.}255\mathrm{.}255$

Given a list of strings, ip$\_$addresses, of size n$,$ representing possible IPv$4$ addresses, for each address, determine if it is a valid IP or not, and classify it into one of the $5$ classes. Return an array of n integers that represent the index of the regions for the corresponding IP addresses.

Represent an invalid IP as $-1.$ Give me a java $8$ code