Fastest way to check if a String can be parsed to Double in Java

Question

I know there's a million ways of doing this but what is the fastest? This should include scientific notation.

NOTE: I'm not interested in converting the value to Double, i'm only interested in knowing if it's possible. i.e. private boolean isDouble(String value).

Answer 1

There is a handy NumberUtils#isNumber in Apache Commons Lang. It is a bit far fetched:

Valid numbers include hexadecimal marked with the 0x qualifier, scientific notation and numbers marked with a type qualifier (e.g. 123L).

but I guess it might be faster than regular expressions or throwing and catching an exception.