Question

I am looking for a regex java pattern to match the following string:

 [Phone Number]= 1234567890

Here:
The regex should look for hardcoded string of "[Phone Number]=” followed by space or not, and followed by
any numbers of digits.

That means it should match:

[Phone Number]= 123456 and
[Phone Number]=1234567890

Any help is appreciated.

Answer 1

Well, something like:

String pattern = "\\[Phone Number\\]= ?\\d+";

• The backslashes are doubled just because of Java string literal syntax
• The square brackets are escaped to avoid them being used to group a set of characters
• The ? means zero or one space
• The \d+ (after unescaping) means “at least one digit”