FastCat is a streamlined version of StringBuilder that does not
allocate a buffer until the very last minute, and allocates it the exact
size needed.  You use it in writing your own Java Programs.  It works very
similarly to StringBuilder, so the Javadoc should be all you need.

It does not work well if you append one character at a time to your
StringBuilder.  It works very quickly with minimal RAM usage if you can
accurately predict roughly how many chunks you will append but have only a
vague idea of the final total size.

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Version History:

1.0 2009-09-29 initial release

1.1 2009-10-09 return this from append

1.2 2010-01-25 correct bug in clear method.

1.3 2010-02-13 convert to compile under Java 1.5.

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