Regular expression to check Not Null values and empty strings

Question

What would be the regular expression to check a string value is "Not null and not empty" in java? i tried like this "/^$|\s+/", but seems not working.

Answer 1

Considering this: your string can not contain "null" as string:

String.valueOf(input).matches("^null|$");

Otherwise check input != null and remove null| from the regex.