GFG-POTD | Validate an IP Address using Java | 06 August 2024 | Practice | String | Data Structure

August 6, 2024 Alice AUSTIN

Geeks-for-Geeks | Practice Problem
06 August 2024
Problem : Validate an IP Address using Java
Level : Medium
Language : Java
Topics Tag : Strings | Data Structure

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➡️ Problem Statement as follows :

You are given a string str in the form of an IPv4 Address. Your task is to validate an IPv4 Address, if it is valid return true otherwise return false.

IPv4 addresses are canonically represented in dot-decimal notation, which consists of four decimal numbers, each ranging from 0 to 255, separated by dots, e.g., 172.16.254.1

A valid IPv4 Address is of the form x1.x2.x3.x4 where 0 = (x1, x2, x3, x4) = 255. Thus, we can write the generalized form of an IPv4 address as (0-255).(0-255).(0-255).(0-255)

Note: Here we are considering numbers only from 0 to 255 and any additional leading zeroes will be considered invalid.

Examples :

Input: str = 222.111.111.111

Output: true

Explanation: Here, the IPv4 address is as per the criteria mentioned and also all four decimal numbers lies in the mentioned range.

Input: str = 5555..555

Output: false

Explanation: 5555..555 is not a valid. IPv4 address, as the middle two portions are missing.

Expected Time Complexity: O(n)
Expected Auxiliary Space: O(1)

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