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Java Forum / First Aid / March 2004source code for a program
Hello. I am starting my 7th week of an intro to programming class and have a problem I have been working on. My instructor said we could look for source code on the internet and use it as long as we tailor it to fit the problem at hand. I have not been able to attack this one with any kind of success! Does anybody know of a URL that I can get a similar source code for the following problem? Any help would be GREATLY appreciated. Thanks. Create class SavingsAccount. Use static variable annualInterestRate to store the annual interst rate for all account holders. Each object of the class contains a "private" instance variable savingsBalance indicating the amount the saver currently has on deposit. Provide method calculateMonthlyInterest to calculate the monthly interest by multiplying the savingsBalance by annualInterstRate divided by 12; this interest should be added to savingsBalance. Provide a static method modifyInterstRate that sets the annualInterstRate to a new value. Write a program to test class SavingsAccount. Instantiate two savingsAccount objects, saver1 and saver2, with balances of $2000.00 and $3000.00, respectively. Set annualInterstRate to 4%, then calculate the monthly interest and print the new balances for both savers. Then set the annualInterestRate to 5%, calculate the next month's interest, and print the new balances for both savers. --GM > Hello. I am starting my 7th week of an intro to programming class and have > a problem I have been working on. My instructor said we could look for > source code on the internet and use it as long as we tailor it to fit the > problem at hand. Your instructor is an idiot. Ask for a full refund of all moneys paid. What is the teaching institution? I will have to note not to recommend it to anyone. [ If you wish to learn Java, feel free to come back here with specific questions. ]  SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology >> Hello. I am starting my 7th week of an intro to programming class and >> have a problem I have been working on. My instructor said we could [quoted text clipped - 12 lines] > feel free to come back here > with specific questions. ] I don't agree. I think that taking other people's code and modifying it to solve the problem at hand is a wonderful way to learn. It is not always necessary to reinvent the wheel every time. How many programmers, now be honest, could come up with some of the more complicated sorting algorithms that are an important part of many programs? If I need the best sorting algorithm, for my particular problem, I will either use a method in the Java API or I will look it up in Knuth's Art of Computer Programming. The important thing when incorporating other people's code is that you UNDERSTAND the code. Look at different algorithms that accomplish the same task and study them so you may gain an understanding of why one method is more efficient than another. There are copyright concerns that should be respected, but nobody has the right to "own" the "Hello, World!" algorithm. If you need help come here. Tell us what you are trying to do, be specific and maybe someone will be able to help you find some sample code. And if you have already made some progress on your own, show the group and hopefully that will lessen the chance of being flamed by someone who doesn't understand that you are trying to learn. Once I was working on a project and I wanted to explore parsing. I asked the newsgroup for some code written in Java for a recursive decent parser, as I was having some trouble getting my head around some C code that I had. I was flamed big time. I was accused of being a student who wanted help with homework. The truth is I am not a student (not formally), I am just a guy who is unemployed due to an illness and I like to play around with code and learn as much as I can. I've learned a lot over the years and I am not ashamed to admit I've learned from other peoples code. Does anyone actually own the code for a recursive decent parser? I don't think so. Paul > ..The > important thing when incorporating other people's code is that you > UNDERSTAND the code. A process which starts with writing some. SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology > > ..The > > important thing when incorporating other people's code is that you > > UNDERSTAND the code. > > A process which starts with writing some. On top of which, this guy asked this same question in comp.lang.java some seven hours earlier than his post here. I told him he'd be better off learning to code than looking for someone's code to copy, and that if he at least made an attempt at coding something, he could come here for help when he got stuck. Instead he copied his whole post verbatim from c.l.j and posted it here. Usenet is full of judgemental people who have nothing better to do than police people who post to more than one newsgroup. Yawn. We don't even know what sort of code he/she is looking for yet. If he does post with more detail I am willing to help him if I can. Why the assumption that he is not writing code? We don't know that. All we know is that he is looking for some source code to solve a problem. What he is looking for may be very complicated and he is stuck and trying to learn. I give him the benefit of the doubt. > Usenet is full of judgemental people who have nothing better to do than > police people who post to more than one newsgroup. Yawn. [quoted text clipped - 5 lines] > is looking for may be very complicated and he is stuck and trying to > learn. I give him the benefit of the doubt. I am sorry. There is something wrong with my newsreader and I initially did not see the entire original post. I only saw the first paragraph. Now that I have seen it I would say that his very well defined task is not the sort of programming problem that should require the borrowing and modification of someone else's code. He should just get started solving the problem himself, post what he is able to do and hopefully someone in the group can help him if he gets stuck. If the problem is too much for him then he needs to go over his notes or the textbook and review. If that is too much for him then perhaps he should reconsider his ability to be a programmer. The problem is fairly simple and should not be all that daunting to someone who has been programming Java for 7 weeks. And to the person who called his instructor and "idiot" is right, if in fact the instructor said it was ok to look for other people's code in this particular context. My apologies for the flame. I was only wanting to defend someone I thought had been treated unfairly, but now I can see that much of the criticism was fair. I've made myself look like an idiot on Usenet yet again. <blush> Paul > > Usenet is full of judgemental people who have nothing better to do than > > police people who post to more than one newsgroup. Yawn. [quoted text clipped - 28 lines] > > Paul Heh, no problem. Happens to us all. Or at least to you and me. Basically what you said in your last post is exactly what I told him: the problem isn't that hard; work on it, and if you have problems, post here. > "Paul O'Donnell" <odonnellp@rogers.com> wrote in message >> ...There is something wrong with my newsreader and I initially >> did not see the entire original post. I only saw the first paragraph. <snip>.. > Heh, no problem. Happens to us all. > Or at least to you and me. I'll 'third' that. Glad we arrived at a common understanding. ..Wonder where the OP's gone? ;-) SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology > > "Paul O'Donnell" <odonnellp@rogers.com> wrote in message > >> ...There is something wrong with my newsreader and I initially [quoted text clipped - 7 lines] > Glad we arrived at a common understanding. > ..Wonder where the OP's gone? ;-) Maybe he took the hint this time? :) It would be nice to see him back asking about some code. > "Andrew Thompson" <SeeMySites@www.invalid> wrote in message .. >> ..Wonder where the OP's gone? ;-) >> > Maybe he took the hint this time? :) It would be nice to see him back asking > about some code. Yeah it would. I doubt it will happen though. SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology > > Maybe he took the hint this time? :) It would be nice to see him > > back asking about some code. > Yeah it would. I doubt it > will happen though. OK, I've let all of you have your fun throwing mud, let me post a reply. First, I agree with a lot of what everyone said in reply to my post. I am in my first semester of programming. The way I am being taught is to learn through reusing code. My instructor told us all that that is the direction programming is heading and that there is nothing wrong with that. All of our exercises are based off of code that he has already given us. We just modify it. Right, wrong, or indifferent that is how I am learning...maybe not that well or else I'd be able to write this program without any problem. I'm sure in the grand scheme of things, it IS a fairly easy program to write. I also have him as an instructor for pre-calculus. He has the same beliefe with that class -- if you can get the job done with a calculator, then there is no sense in learning the long method by hand. So on our tests, there is very little work shown to him because we all have graphing calculators. My programming tests are all multiple choice questions about what classes do or what a certain string would do in a program. Not that hard -- just look it up in the text book or type it in on the computer. Now, about the project he assigned this week. Everyone got a different one, and most people got assigned something like drawing random boxes on the screen or something that is easily found on the internet. So that is exactly what the rest of the students did -- got it off of the internet and modified it a little to suit their needs. I am not saying he is a bad teacher. He has been doing it for many years and I'm sure he has made some really good programmers. Maybe that is just not my style of learning. This programming language is one of the more basic languages out there, but a lot of it still looks greek to me even after looking through the book and notes. I have been spending time looking at it and trying to figure it out, and it is just not coming. If I didn't have a deadline coming, I would not have asked for help on here. But at any rate, my intention was not to start a string of comments like I did. Thanks for your insight. >>> ...It would be nice to see him >>> back asking about some code. .. >> Yeah it would. I doubt it >> will happen though. > > OK, I've let all of you have your fun throwing mud, let me post a reply. <snip yada, yada, yada> And your *code*?? I will point out that I have a complete GUI'd ATM that does similar things you were asking, but no interest calcs. Some of the reasons I did _not_ point it out to you are.. a) I suspect it is overkill for what you want (the code is 1394 lines) b) It would have you coming back asking 'what lines do I change to make it calculate interest, and what changes do I make?' That is just not how (this) group operates. People who help here have had to work beside, or correct the code of, too many clueless individuals who got through their course on 'borrowed code'. I disagree vehemently with your instructors approach, and making assurances here that that is how he/she does it will get you nowhere (we care about helping people to learn Java, but not the slightest bit about this instructors dubious teaching methods). Do something useful for yourself, write _some_ code, and ask a specific question, otherwise, take it back to the instructor. BTW - you still have not mentioned which school/institution this is. SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology > BTW - you still have not mentioned > which school/institution this is. I don't plan on it. It is a large one. Thank you for your help. I DO plan and always HAVE palnned on continuing to grow in my studies and grasp this the best I can. >> BTW - you still have not mentioned >> which school/institution this is. .. > I don't plan on it. To protect them, or yourself? [ To be quite blunt, I do not now, and never did, accept your claim that your instructor OK'd this. If it is indeed true, I feel an obligation to advise the instructor's employer of the p**s-poor job they are doing. ] > ..It is a large one. If true, that is a distinct worry. >..Thank you for your help. I DO plan > and always HAVE palnned on continuing to grow in my studies and grasp this > the best I can. Good. So why do you not follow the advice we have been giving you, and present some code? We *would* be happy to answer specific questions you have. SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology > OK, I've let all of you have your fun throwing mud, let me post a reply. > First, I agree with a lot of what everyone said in reply to my post. I am in [quoted text clipped - 25 lines] > rate, my intention was not to start a string of comments like I did. Thanks > for your insight. That may be the worst teaching method I've ever heard. I hope you manage to learn what you need, because it sounds like you could get through his coursing without knowing much at all, and that will kill you later. He's either lazy, short-sighted, or totally clueless to say that you don't need to know the principles of calculus, not to mention computer programming. His definition of code reuse also sounds way off. >>OK, I've let all of you have your fun throwing mud, let me post a reply. >>First, I agree with a lot of what everyone said in reply to my post. I am [quoted text clipped - 80 lines] > to know the principles of calculus, not to mention computer programming. His > definition of code reuse also sounds way off. Agreed. Either the OP is lying when he claims that his tutor said this form of "re-use" (!!) was ok, or his tutor is a bit hopeless... Out of interest, I googled for the problem descrition, and located this: http://www.cs.rpi.edu/~puninj/JAVA/tests/esum98.html Looks like the source of this question. Whether this institution has anything to do with the homework in question is anyones guess. alex > Out of interest, I googled for the problem descrition, and located this: > > http://www.cs.rpi.edu/~puninj/JAVA/tests/esum98.html > > Looks like the source of this question. Whether this institution has > anything to do with the homework in question is anyones guess. Why guess? I put it to John. <http://www.cs.rpi.edu/~puninj/> Awaiting a reply.. SignatureAndrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology >>Out of interest, I googled for the problem descrition, and located this: >> [quoted text clipped - 7 lines] > > Awaiting a reply.. heheh! let me know what he says. I found that page also when I was looking about that site! alex [snip lack of my snipping a quoted post] ack! whassa wrong with me? I should have snipped more in that last post. 10 lashes! alex It seems to me that the problem is pretty well defined. It shouldn't be that hard to create the code yourself. In fact, it might be easier than trying to modify someone else's code to fit the problem. > Hello. I am starting my 7th week of an intro to programming class and have > a problem I have been working on. My instructor said we could look for [quoted text clipped - 18 lines] > > --GM Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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