[jira] [Reopened] (LANG-1016) NumberUtils#isParsable method(s)

[JIRA]

     [ 
https://issues.apache.org/jira/browse/LANG-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Juan Pablo Santos Rodríguez reopened LANG-1016:
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Hi Benedikt,

I've just realized that the provided patch doesn't handle negative values, 
allowed by Double.parseDouble( String str ). I'm attaching a patch fixing this 
issue in a moment

br,

> NumberUtils#isParsable method(s)
> --------------------------------
>
>                 Key: LANG-1016
>                 URL: https://issues.apache.org/jira/browse/LANG-1016
>             Project: Commons Lang
>          Issue Type: Wish
>          Components: lang.math.*
>            Reporter: Juan Pablo Santos Rodríguez
>            Assignee: Benedikt Ritter
>             Fix For: 3.4
>
>         Attachments: LANG-1016.patch
>
>
> (for background see 
> [LANG-997|https://issues.apache.org/jira/browse/LANG-997?focusedCommentId=13991193&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13991193])
> 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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