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Julius Davies commented on LANG-1038: ------------------------------------- I think the first line of the Javadoc makes the case that this is a bug: "Checks whether the String a valid Java number." > 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)