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https://issues.apache.org/jira/browse/LANG-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13466218#comment-13466218
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Sebastien Riou commented on LANG-801:
-------------------------------------

It is true that a lot of methods are already available in standard java or in 
some other class of Commons* however the intention was to have one consistent 
API for those conversions (and the "casing" of string result would be part of 
the API contract).
Sorry I have been unable to work more on this recently, and probably for few 
month more (changing continent and job, have to learn the local language...) 
                
> Util for conversion between primitive types
> -------------------------------------------
>
>                 Key: LANG-801
>                 URL: https://issues.apache.org/jira/browse/LANG-801
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.*
>            Reporter: Sebastien Riou
>            Assignee: Joerg Schaible
>            Priority: Minor
>         Attachments: patch_Conversion.txt
>
>
> A utility class to convert data from one primitive type to another, in the 
> most commonly used fashions (big endian/little endian byte order, lsb first 
> or msb first).
> It also deals with arrays of primitive types and String containing 
> hexadecimal numbers.
> Such conversions are needed when dealing with embedded software or hardware 
> modeling/design.
> I attach a initial version which deals with the "default" encoding, the one 
> which seems the most natural on the JVM: little endian byte ordering, and, 
> within a byte, lsb first.
> I plan to implement the other encoding I need:
>  - big endian, lsb first
>  - big endian, msb first 
> So far I implemented about half of the methods needed to cover the default 
> encoding:
>  - methods to convert a large data type into an array of a smaller data type 
> (longToBytes for example)
>  - methods to convert an array of a small data type into a larger data type 
> (bytesToLong for example)
> The remaining half consist of the methods to convert from an array of a data 
> type into an array of another data type (bytesToLongs, LongsToBytes)
> Once this is available for different encodings, the most useful part can be 
> done: the "bridge" methods to convert from one encoding to another

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