Re: Class ... implements ...
On 4/3/2011 9:10 AM, Merciadri Luca wrote:
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Patricia Shanahan<pats@acm.org> writes:
On 4/3/2011 8:29 AM, Merciadri Luca wrote:
...
But surely I'm not doing my homeworks! I can't understand this
remark. Do you really think I would be doing this when everybody could
see them by googling? These are not homeworks. These are mainlt
questions that were asked by the lecturer and for which I can't find
any answer using only his material. These questions do not give some
mark or anything. (If they did, I would not have posted so many things!!)
You may still be missing out on the intended benefit of the questions.
The lecturer may be deliberately asking you questions that require some
thought, experimentation, and reading beyond the handouts in order to
help you build the skills you would need to actually program in
Java.
Sure, and that would be a great thing if these were not past exam
questions. This is an introductory course, and except the slides, and a
compiler, I don't have anything related to Java here. So it looks
easier to either look on the Internet or ask here if I can't find any
answer. The point is that such questions are never asked twice, but
they might help me learn some basic but underlying mechanisms of how
Java works.
If these are past exam questions, you really need to work on solving
them yourself. Knowing the answers to the old questions is useless.
Gaining the background knowledge, understanding, and skills needed to
answer the old questions is the best way I know to prepare to answer the
next set of exam questions.
There would certainly be a better way to learn them, e.g. by buying a
book which treats such subjects. But do you have any recommendation? I
am still looking for a book which would provide answers to such
questions by explaining thoroughly such specifities in a rather
theoretical way.
Generally, what I've read until there on the Internet does not explain
such things, and does not treat `picky' questions such as this one. If
I had a name of a book which would cover these subjects without
covering the rest from the very beginning, I would be glad reading
it. But as of now, I'm still confined to try inferences from
* my slides,
* my compiler,
* my JVM's output in the console.
You have already been given several recommendations for reading matter.
All the questions you have posted could be answered by applying a good
basic general knowledge of Java to the question, rather than by already
knowing the answer. Indeed, I strongly suspect that the people who do
answer your questions are doing so by applying broad theory to the
specific "picky" question. There are just too many of those questions
for anyone to learn the answers to all of them.
For example, I had never previously thought about the harmful
consequences of writing a clone method by explicitly constructing a new
object. I did know to read the Object documentation for methods such as
clone that are defined in Object, and that it is important to think
through the implications of extending any non-final class.
Such inferences might be wrong, or simply unprecise or unadequate. As
a result, I generally like to confront my point of view (which might
be correct or simply too `creative' about some notions) to experts'
ones, and this is something I can do in an easier fashion on Usenet,
tolerating some rude and unjustified remarks from some experts in the
field. (You are obviously not in the `rude remarks' category, but some
here are and this is ... sad.)
You might try a different sort of posting. Don't just post the question,
include your analysis. That way, we can see if you are thinking about
the question in a way that will also get the right answers to other
questions.
Patricia