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From "Benedikt Ritter (JIRA)" <>
Subject [jira] [Commented] (LANG-1016) NumberUtils#isParseable method(s)
Date Sun, 29 Jun 2014 19:11:24 GMT


Benedikt Ritter commented on LANG-1016:

Hello [~juanpablo],

sorry for the late reply, I was on vacation :) about your patch:

I'm not sure about the new name. Take for example {{NumberUtils.isHumanReadableNumber( "64,2"
)}}. This is a perfectly human readable number since in some countries the comma is used as
decimal separator.
Further more your original idea was to provide a method that tells you whether a method is
parsable by {{toDouble/Long/Integer}} methods. So why should the input {{64L}} return false?
This can be parsed to a long value.


> NumberUtils#isParseable method(s)
> ---------------------------------
>                 Key: LANG-1016
>                 URL:
>             Project: Commons Lang
>          Issue Type: Wish
>          Components: lang.math.*
>            Reporter: Juan Pablo Santos Rodríguez
>             Fix For: Review Patch, Discussion
> (for background see [LANG-997|])
> It would be nice to have an {{isParseable}} method (or whatever it may be called), to
be able to identify valid (=parseable) Numbers, something along the lines {{toDouble(String)}}
/ {{toLong(String)}} etc., but returning {{true}} / {{false}} while avoiding at the same time
the {{try/catch(NumberFormatException)}} of those methods.
> This method would be similar to {{isNumber}}, but it should yield {{true}} for invalid
octals like "018" which are parseable as Numbers. The point of this method is to identify
"human" (neither hex nor octal, but should handle decimal points) numbers stored as Strings,

> We are using NumberUtils#isNumber to identify valid (parseable, human) numbers, but as
of 3.3, this method also handles octal numbers, so, f.ex.,  018, which was recognized as a
valid number, isn't recognized anymore as one.

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