Package g0801_0900.s0831_masking_personal_information

Class Solution

java.lang.Object
g0801_0900.s0831_masking_personal_information.Solution
public class Solution extends java.lang.Object
831 - Masking Personal Information.

Medium

You are given a personal information string s, representing either an email address or a phone number. Return the masked personal information using the below rules.

Email address:

An email address is:

  • A name consisting of uppercase and lowercase English letters, followed by
  • The '@' symbol, followed by
  • The domain consisting of uppercase and lowercase English letters with a dot '.' somewhere in the middle (not the first or last character).

To mask an email:

  • The uppercase letters in the name and domain must be converted to lowercase letters.
  • The middle letters of the name (i.e., all but the first and last letters) must be replaced by 5 asterisks "*****".

Phone number:

A phone number is formatted as follows:

  • The phone number contains 10-13 digits.
  • The last 10 digits make up the local number.
  • The remaining 0-3 digits, in the beginning, make up the country code.
  • Separation characters from the set {'+', '-', '(', ')', ' '} separate the above digits in some way.

To mask a phone number:

  • Remove all separation characters.
  • The masked phone number should have the form:
    • "***-***-XXXX" if the country code has 0 digits.
    • "+*-***-***-XXXX" if the country code has 1 digit.
    • "+**-***-***-XXXX" if the country code has 2 digits.
    • "+***-***-***-XXXX" if the country code has 3 digits.
  • "XXXX" is the last 4 digits of the local number.

Example 1:

Input: s = “[email protected]”

Output: “l*****[email protected]”

Explanation: s is an email address.

The name and domain are converted to lowercase, and the middle of the name is replaced by 5 asterisks.

Example 2:

Input: s = “[email protected]”

Output: “a*****[email protected]”

Explanation: s is an email address.

The name and domain are converted to lowercase, and the middle of the name is replaced by 5 asterisks.

Note that even though “ab” is 2 characters, it still must have 5 asterisks in the middle.

Example 3:

Input: s = “1(234)567-890”

Output: “***-***-7890”

Explanation: s is a phone number.

There are 10 digits, so the local number is 10 digits and the country code is 0 digits.

Thus, the resulting masked number is “***-***-7890”.

Constraints:

  • s is either a valid email or a phone number.
  • If s is an email:
    • 8 <= s.length <= 40
    • s consists of uppercase and lowercase English letters and exactly one '@' symbol and '.' symbol.
  • If s is a phone number:
    • 10 <= s.length <= 20
    • s consists of digits, spaces, and the symbols '(', ')', '-', and '+'.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    maskPII(java.lang.String s)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • maskPII

      public java.lang.String maskPII(java.lang.String s)