It all depends I guess but if the footprint is small enough there's no reason to invent the wheel again :)
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It all depends I guess but if the footprint is small enough there's no reason to invent the wheel again :)
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Or you can have a look at [Apache-SVN] Contents of /commons/proper/lang/trunk/src/java/org/apache/commons/lang/math/NumberUtils.java
Search for a method called isNumber :)
For the people out...