blank is numeric, but blank is not numeric?!

Posted by KarlP on 20 July, 2010 Leave a comment (0) Go to comments

Someone please explain this piece of sheer lunacy in apache commons-lang’s (otherwise superb) StringUtils…

From the docs…

 StringUtils.isNumeric(null)   = false
 StringUtils.isNumeric("")     = true
 StringUtils.isNumeric("  ")   = false

Insanity. I can only assume this was an error in the old code, and is now preserved for backward compatibility. :(

What you want instead is NumberUtils.isNumber()

java

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