commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Duncan Jones (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LANG-1038) NumberUtils#isNumber() returns false for "+2" and true for "-2"
Date Wed, 24 Sep 2014 13:41:34 GMT

     [ https://issues.apache.org/jira/browse/LANG-1038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Duncan Jones updated LANG-1038:
-------------------------------
      Description: 
The strings {{"\+2"}} and {{"\+  2"}} give a "False" result when tested by {{isNumber()}}.

Case one, {{"\+2"}} is legal with {{Integer.parseInt()}}.  Case two: {{"\+  2"}} gives an
exception with {{Integer.parseInt()}}.

I believe the function should match legitimate inputs for the respective parser function depending
on the number type.

Workaround: Use something like:
{code:java}
NumberUtils.isNumber( wrkStr.replaceFirst( "\\+", "") )
{code}

  was:
The strings:

    +2
    +  2

Give a "False" result when tested by isNumber().  Case one, "+2" is legal with Integer.parseint().
 Case two: "+  2" gives an exception with Integer.parseInt().

I believe the function should match legitimate inputs for the respective parser function depending
on the number type.

Workaround:

Use something like:

  NumberUtils.isNumber( wrkStr.replaceFirst( "\\+", "") )

    Fix Version/s: Discussion
           Labels:   (was: math number parse)

> NumberUtils#isNumber() returns false for "+2" and true for "-2"
> ---------------------------------------------------------------
>
>                 Key: LANG-1038
>                 URL: https://issues.apache.org/jira/browse/LANG-1038
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.math.*
>    Affects Versions: 3.1, 3.3.2
>            Reporter: will mason
>             Fix For: Discussion
>
>
> The strings {{"\+2"}} and {{"\+  2"}} give a "False" result when tested by {{isNumber()}}.
> Case one, {{"\+2"}} is legal with {{Integer.parseInt()}}.  Case two: {{"\+  2"}} gives
an exception with {{Integer.parseInt()}}.
> I believe the function should match legitimate inputs for the respective parser function
depending on the number type.
> Workaround: Use something like:
> {code:java}
> NumberUtils.isNumber( wrkStr.replaceFirst( "\\+", "") )
> {code}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message