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https://issues.apache.org/jira/browse/JEXL-169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641565#comment-14641565
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Henri Biestro commented on JEXL-169:
------------------------------------
JexlArithmetic.isFloatingPointNumber() will use the following regexp:
{code}
/**
* The float regular expression pattern.
*/
public static final Pattern FLOAT_PATTERN =
Pattern.compile("^[+-]?\\d*(\\.\\d*)?([eE]?[+-]?\\d*)?$");
{code}
> A string is wrongly identified as FloatingPointNumber
> -----------------------------------------------------
>
> Key: JEXL-169
> URL: https://issues.apache.org/jira/browse/JEXL-169
> Project: Commons JEXL
> Issue Type: Bug
> Affects Versions: 2.1.1
> Reporter: Robert Neßelrath
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.0
>
>
> When concatenating two strings with one containing an 'e' character, an
> ArithmeticException is thrown.
> The problem lies in the JexlArithmetic.isFloatingPointNumber() method in line
> 200.
> return ((string.indexOf(46) != -1) || (string.indexOf(101) != -1) ||
> (string.indexOf(69) != -1));
> With this solution also the String "New York" or "hello.world" are floating
> point numbers. A solution with a regular expression would be better
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