StringUtils.isNumeric returns false on negative value
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Key: LANG-634
URL: https://issues.apache.org/jira/browse/LANG-634
Project: Commons Lang
Issue Type: Bug
Components: lang.*
Affects Versions: 2.2
Reporter: Arjan Moraal
StringUtils.isNumeric returns false for negative values.
So this unit test line will break the test:
assertTrue(StringUtils.isNumeric("-1"));
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