This is a pair of library classes to include in your own code for
manipulating ArrayLists.  This package is only use to a Java programmer.
It does nothing on its own.
It consist of two classes: SortedArrayList and Merge.  SortedArrayList is
an ArrayList that remembers how it is sorted, so that if you ask it to
sort, it can sometimes bypass the work when it is already in order.  You
declare the order you want and it keeps the list sorted, You just call
sort whenever you need the list to be in perfect order.  It may or may not
actually sort the list at that time.  It automatically avoids physically
sorting when it does not really have to.
Merge lets you merge/prune two SortedArrayLists in any of 32 different
ways, e.g.  union, intersection, update...  It also lets you dedup and
prune individual SortedArrayLists.  They are used extensively as part the
replicatorsender package.  Having an look at that code may give you a more
realistic view of what they can do.
To use them, have a look at the source code and the sample drivers.  They
don't do anything useful standalone.  You must incorporate them into your
own code.
Why the spectrum icon?  It represent the colours of light sorted in order
by wavelength.