Mask some part of String

I have phone no and email address. I dont want to show full information.
So I am thinking mask some character using Regex or MaskFormatter.

Input and desired result

1) 9843444556 -  98*******6   
2) test@mint.com - t***@****.com

I have achieved this with String loop. But exactly I want to this by using regex or mask. Would you please kindly inform it?

Phone:

String replaced = yourString.replaceAll("\\b(\\d{2})\\d+(\\d)", "$1*******$2");

Email:

String replaced = yourString.replaceAll("\\b(\\w)[^@]+@\\S+(\\.[^\\s.]+)", "$1***@****$2");

Explanation: phone

The \b boundary helps check that we are the start of the digits (there are other ways to do this, but here this will do).
(\d{2}) captures two digits to Group 1 (the two first digits)
\d+ matches any number of digits
(\d) captures the final digit to Group 2
In the replacement, $1 and $2 contain the content matched by Groups 1 and 2

Explanation: Email

The \b boundary helps check that we are the start of the characters (there are other ways to do this, but here this will do).
(\w) captures one word char to Group 1
[^@]+ matches one or more chars that are not @
\S+ matches one or more chars that are not whitespace chars
(\.[^\s.]+) captures a dot and any chars that are not a dot or space to Group 2
In the replacement, $1 and $2 contain the content matched by Groups 1 and 2

来源：https://stackoverflow.com/questions/24795817/mask-some-part-of-string

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