Laurie Harper wrote:
As a more general example, consider if you wrote all your code to use
ArrayList and later found, after profiling, that you needed to switch
to LinkedList for performance reasons. You'd have to update all your
code -- including all the clients of all the methods that accepted or
returned an ArrayList.
Conversely, if you coded to the List interface, you would only need to
change the implementation code. All the client code would be
unaffected. That's Dave's point about being able to switch X for Y
with minimal impact.
That was a much better example than mine :) I could have typed so much less!
Dave
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