Regex that checks that a string should not start or end with a space and should not end with a dot (.)

Question

As per the requirement I need to generate a regex to match a String that doesn't start or end with space. Apart from that the string should not end with a special character dot(.). As per my understanding I've generated a regex "\\S(.*\\S)?$" which restrict the string that has a space at the beginning and at the end of the string. With this expression I need to validate the regex for string that ends with dot. Any sort of help would be appreciated.

Answer 1

Use following regex

^\S.*[^.\s]$

Regex explanation here

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If you want to match single character then you can use look-ahead and look behind-assertion.

^(?=\S).+(?<=[^.\s])$

Regex explanation here

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If look-behind not supports then use

^(?=\S).*[^.\s]$

Regex explanation here