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Third-year student at the department of information processing science of Oulu University, Finland. I'm specializing in software engineering.
- Interests
- Playing guitar and drums, composing music, reading fantasy novels, PC gaming, movies, all forms of escapism!
36 Posted Topics
 | Hi, I've been searching all the internet for an answer for my problem, but none of the sites I've stumbled upon haven't given any results. So, I have a JList, held inside JSCrollPane, held inside JPanel inside JFrame. I have a MySQL database, and another block of code retrieves stuff …  |
| | Hey there, I've got a small problem. I'm writing an UDP client-server system, and I wanted to use streams with UDP. I found [UDPOutputStream](http://www.java2s.com/Code/Java/Network-Protocol/UDPOutputStream.htm) source and pasted it into my project. Now, when I try to initialize it, it freezes. This is how I try to initialize it: outStream = … |
| | Hi guys and gals, I'm writing a file parser, which reads "source code -ish" text from files. The text is usually in this kind of format: Module: { Submodule: { Property: Value ... } Submodule: { } } Module: { Property: Value } I've written a simple but hazardous reader … |
| | Hmm, before the line '8', try to add something like this: Console.WriteLine("Bitmap format: " + bitmap.PixelFormat); ... and see what it tells you. Then, you should probably use the same pixel format on the error line. Also, on the side note, I don't think it's necessary to swap the RGBA … |
| | Hiya! I have a function that creates 3D meshes procedurally from the given parameters. It creates a four-sided box, which is (for example) 1.0 wide, 1.0 high and 100.0 long. The box is then subdivided into multiple parts, so if the aforementioned box is subdivided to three parts, it will …  |
| | Re: need your help The getters and setters are only for the variables. If you want to create an object, you always need a constructor. As with the arrays, what is it you want to achieve? If you are having trouble with understanding the principles of arrays, I suggest you to read through your …  |
| | Hmm, shouldn't it work if you copy the project folder, rename the folder (but not the project files) and then add it as an existing project? You should be able to do this and rename the newly-added project afterwards. |
| | Hey guys! I've got a small problem that I can't figure out. I have 2D arrays of arbitrary sizes, and they contain different characters representing different stuff (like 'a', 'b', 'c' etc.). Now, the problem is, I need to find horizontal and vertical lines of same characters and make new … |
| | It may take a while before your app gets on "the shelves", so wait for it for a moment. Also, you should directly contact Google if you're having problems with Android Market, they've developed the system so they can probably help you better. :) |
| | Hey, I'm developing a processor-intensive app for Android, which includes nested loops. The development process is still going on, but I'm already trying to find ways to optimize the performance. And I need tips and tricks for it. :) Mainly I've been changing all the for-loops from (int i = … |
| | Hiya, I wasn't really sure if this goes under Java or Game Development forums, so I decided to post it here. I'm making a simple "Scrabble" game, which checks letters placed on the table and tries to find if they form proper nouns. I have a list of words, and … |
| | Hey, I'm working on a project where we have to stream files from a server app to clients. I have it all working nicely, but we have a special client type that cannot save files to HDD, not even temporarily. I can get the byte stream from server to this … |
| | Hiya, I've got a small problem. I have an interface called "event", which represents a networking event. I have classes implementing this interface. Now, when my server app receives a new event, it checks the class of the event and acts accordingly. This works nicely when the implementing classes are … |
| | Hi, I was programming with POSIX threads and I was using semaphores. All of a sudden the program didn't work anymore, and I started searching for the problem. It turns out that my first semaphore command "sem_open()" causes the problem. It returns value "0", or "SEM_FAILED", and sets errno to … |
| | Hey, I have a bit of a problem. I have a class that uses C libraries to make a TCP connection, which is accomplished with the connect() function. Now, I'd like to use this class in a Qt program and make it inherit QObject. The problem is, since I need …  |
| | Hi, I have a little bit of a problem with my client / server apps. I'm trying to build a simple program that resembles a small instant messaging app. So far I've been working on the "user login" and "status change" parts, along with a query to get the status … |
| | Hey, I'm trying to get a random number for a small game which lights up random lights. I can't figure out a way to get the number random. I've tried seeding the Random() function with current time, but it's not working. It always lights up the third light. Here's my …  |
| | Hey, I'm trying to compile a simple producer-consumer program with Qt, using QThreads. I get this error message when trying to compile: [CODE] In file included from /usr/include/qt4/QtCore/QThread:1, from producer.h:4, from mainwindow.cpp:3: /usr/include/qt4/QtCore/qobject.h: In copy constructor ‘QThread::QThread(const QThread&)’: /usr/include/qt4/QtCore/qobject.h:309: error: ‘QObject::QObject(const QObject&)’ is private /usr/include/qt4/QtCore/qthread.h:60: error: within this context In … |
| | Hi, I'm having a problem with my C code. I have a program that fork()'s a child process. The child process waits a time period defined by command line parameter, then alarms the parent process. Now, the program has to handle SIGUSR1 and SIGUSR2 signals too. The first one should … |
| | Hey, I've been trying to search for a nice, easy-to-read material about signals in C. So far I haven't found anything that could get through my gray brain mass. My university's material gives only a small surface scratch to the topic, and internetz hasn't been able to tell me much …  |
| | EDIT: I found the solution already. I had to malloc() memory for rec_msg. :) Hi, I've got a little problem with my (unix) C program. I'm trying to make a HTTP request to fetch a page from a site. I can resolve the IP, make a socket, connect and send … |
| | Hey, I have a problem in my database. I have these two tables: [CODE] Table "File": +----------+--------------+-----+----------------+ | Field | Type | Key | Extra | +----------+--------------+-----+----------------+ | idFile | int(11) | PRI | auto_increment | | path | varchar(255) | | | +----------+--------------+-----+----------------+ Table "Media": +----------+--------------+-----+----------------+ | Field | … |
| | [QUOTE=jon.kiparsky;1396787]You could put the initialization in the constructor for an abstract class, and hope they call super(). What about declaring a static final in the parent class? Would that do it?[/QUOTE] That indeed does the job, but it's final, so it can't be altered afterwards. Therefore it's not that useful … |
| | Hi! I'm building a program which connects to a MySQL server. The program saves the server passwords in SHA format. There's one class responsible for converting and checking the passwords, and another one for DB connection. Now, when the user starts the program, (s)he types in the username and password. … |
| | Hey! I've got a SELECT query which fetches rows based on a search string using LIKE command. I was wondering, how could I make it to skip "The " from the beginning of the value? For example, I have TV series listed in the database, like "Futurama", "The Office", "The …  |
| | Hey, I was just wondering about searching a binary tree for the smallest / the largest value. Normally, the smallest is found by following the left branch until the last leaf is found. But what if we have a non-optimizing tree like this (8 being the root): 8 - 10 … |
| | You should google around some basic programming topics, or go to your local library or university's library to get some general programming books. [url]www.cplusplus.com[/url] has lots of reference material to check when you're in doubt with a specific part of your code, for example, loops. After starting to get the … |
| | Hey, I've got a bit of a problem: [CODE] vector<BaseClass*> stuffvector; BaseClass* temp = new DerivedClass(par_a, par_b); stuffvector.push_back(temp); delete temp; [/CODE] This causes the program to crash. I have virtual destructor, so the DerivedClass's destructor should be called just fine. Does it have something to do with the vector? 'Cause … |
| | There's quite a few problems there. [CODE] int count, score; float average=0.0; count=0 int numTimesNeeded = []; int total=0; while ( count < numTimesNeeded ) [/CODE] These shouldn't be outside main(). Every line of code should end with ';', and - as you might notice - the line with "count=0" … |
| | So, here's my problem: I have a superclass: [CODE] Class SuperClass { virtual someMethod() = 0; } [/CODE] ... and then I have multiple classes that inherit SuperClass. Now, if I want to put objects made from the subclasses to a single vector<SuperClass>, how could I get the abstract function … |
| | Hey! I was writing my code, and just became wondering if I get a memory leak here. The program has a function which checks and creates a "Time" object, which simply includes integer values for hours and minutes. It returns the Time-object created to the main code. The thing is, … |
| | Hey! Again, small but devious problem for me: I have a string that gets time as an input, in a format like "9.45" or "15.37". How do I extract the hours and minutes to integer variables, when the hour part may consist of either one or two digits? If it … |
| | Hey! I've got a little problem I have no idea where to begin with. I've got a string and I need to check the insides of it. The string should be formatted like <letter><number>, for example "A1" or "F4". The letters can only be from A to F and numbers …  |
| | Hey! I'm starting my introductory C++ course exercise work, and I'm in a bit of a trouble trying to figure out the class structure. The idea of the program is to find out the quickest way possible from a bus stop to the destination bus stop. There's six bus lines … |
| | Hey again! I ran into a new problem in my university course exercises. Basically, I'm trying to read things from a .txt file. Every line is supposed to get converted into an object called "Client", and lines are formatted like this: <account:int> <firstName:string> <lastName:string> <balance:double> I have written my own … |
| | Hi, I'm studying C++ at the university and came across a problem in my exercises. Basically I'm trying to retrieve an integer from an object via its getter method. The object is stored in a vector. Here's the main.cpp part: [CODE] vector<Client> vektori; ... vektori.push_back(Client(account, firstName, lastName, balance)); ... vector<Client>::const_iterator … |
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