Package g0401_0500.s0468_validate_ip_address

Class Solution

java.lang.Object
g0401_0500.s0468_validate_ip_address.Solution
public class Solution extends Object
468 - Validate IP Address\. Medium Given a string `queryIP`, return `"IPv4"` if IP is a valid IPv4 address, `"IPv6"` if IP is a valid IPv6 address or `"Neither"` if IP is not a correct IP of any type. **A valid IPv4** address is an IP in the form "x1.x2.x3.x4" where 0 <= xi <= 255 and xi **cannot contain** leading zeros. For example, `"192.168.1.1"` and `"192.168.1.0"` are valid IPv4 addresses but `"192.168.01.1"`, while `"192.168.1.00"` and `"[email protected]"` are invalid IPv4 addresses. **A valid IPv6** address is an IP in the form "x1:x2:x3:x4:x5:x6:x7:x8" where: * 1 <= xi.length <= 4 * xi is a **hexadecimal string** which may contain digits, lower-case English letter (`'a'` to `'f'`) and upper-case English letters (`'A'` to `'F'`). * Leading zeros are allowed in xi. For example, "`2001:0db8:85a3:0000:0000:8a2e:0370:7334"` and "`2001:db8:85a3:0:0:8A2E:0370:7334"` are valid IPv6 addresses, while "`2001:0db8:85a3::8A2E:037j:7334"` and "`02001:0db8:85a3:0000:0000:8a2e:0370:7334"` are invalid IPv6 addresses. **Example 1:** **Input:** queryIP = "172.16.254.1" **Output:** "IPv4" **Explanation:** This is a valid IPv4 address, return "IPv4". **Example 2:** **Input:** queryIP = "2001:0db8:85a3:0:0:8A2E:0370:7334" **Output:** "IPv6" **Explanation:** This is a valid IPv6 address, return "IPv6". **Example 3:** **Input:** queryIP = "256.256.256.256" **Output:** "Neither" **Explanation:** This is neither a IPv4 address nor a IPv6 address. **Constraints:** * `queryIP` consists only of English letters, digits and the characters `'.'` and `':'`.

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    • Solution

      public Solution()

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