Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \ )

Question

I have a problem with a regex in java.

When I try to use this regex:

 ^(?:(?:([01]?\\d|2[0-3]):)?([0-5]?\\d):)?([0-5]?\\d)$  

I g

Answer 1

you can use notepad++ with find / and replace with //