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<p class="MsoNormal" style="margin-left:.5in">There is one form of array builder already in the JDK - Stream.builder(). This doesn't cover off all of the use-cases, but covers some of them (notably not the byte array case).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for pointing that out!  Under-the-covers it relies on java.util.stream.SpinedBuffer, which is built on the same type of segmented structure I suggested.  There are some differences and I need to measure some of the performance aspects,
 but it is definitely aimed at the same type of problem.<o:p></o:p></p>
<p class="MsoNormal">    John<o:p></o:p></p>
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