Here is the patch that adds stringToLong(String str), stringToLong(String str, long), stringToDouble(String str) and stringToDouble(String str, double), testcases are also included.
I have also improved the testcase for stringToFloat(String).
Hopefully I managed to get the diff right. I had to remove several lines by hand because of differences in the indentation (space vs tabs?). Is there any document that describes what codestyle commons-lang is supposed to use?
commons-lang-NumberUtils.zip
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