[jira] [Commented] (LANG-1353) NumberUtils.isNumber bug

["yusw (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LANG-1353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171670#comment-16171670 ] 

yusw commented on LANG-1353:
----------------------------

This is a trap, if you do not see the specific implementation of the method, who do not know will be treated as octal. I do not think it's a good practice.

> NumberUtils.isNumber bug
> ------------------------
>
>                 Key: LANG-1353
>                 URL: https://issues.apache.org/jira/browse/LANG-1353
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.math.*
>    Affects Versions: 3.6
>            Reporter: yusw
>            Priority: Critical
>             Fix For: 3.7
>
>
> hi,I used to NumberUtils.isNumber()[version:3.6] find this error, this error is mainly caused by method isCreatable() in the 723 line of code。
> See below for details:
>             String str = "0927";
>             System.out.println(NumberUtils.isNumber(str));
>             {color:red}//result:false{color}
>             String str1 = "9027";
>             System.out.println(NumberUtils.isNumber(str1));
>             //result:true



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