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• Is there any complications or side effects for changing final field access/visibility modifier from private to protected?

  - by Software Engeneering Learner

  I have a private final field in one class and then I want to address that field in a subclass. I want to change field access/visibility modifier from private to protected, so I don't have to call getField() method from subclass and I can instead address that field directly (which is more clear and cohessive). Will there be any side effects or complications if I change private to protected for a final field? UPDATE: from logical point of view, it's obvious that descendant should be able to directly access all predecessor fields, right? But there are certain constraints that are imposed on private final fields by JVM, like 100% initialization guarantee after construction phase(useful for concurrency) and so on. So I would like to know, by changing from private to protected, won't that or any other constraints be compromised?

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• Get and set accessors do they protect different instances of a variable?

  - by Chris Halcrow

  The standard method of implementing get and set accessors in C# and VB.NET is to use a public property to set and retrieve the value of a corresponding private variable. Am I right in saying that this has no effect of different instances of a variable? By this I mean, if there are different instantiations of an object, then those instances and their properties are completely independent right? So I think my understanding is correct that setting a private variable is just a construct to be able to implement the get and set pattern? Never been 100% sure about this.

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• O'Reilly Deal of the day - 10/June/2012 - Introducing HTML5 Game Development

  - by TATWORTH

  Today's deal of the day from O'Reilly at http://shop.oreilly.com/product/0636920022633.do?code=DEAL is Introducing HTML5 Game Development"Making video games is hard work that requires technical skills, a lot of planning, and—most critically—a commitment to completing the project. With this hands-on guide, you’ll learn step-by-step how to create a real 2D game from start to finish. In the process, you’ll use Impact, the JavaScript game framework that works with HTML5’s Canvas element. Not only will you pick up important tips about game design, you’ll also learn how to publish Impact games to the Web, desktop, and mobile—including a method to package your game as a native iOS app. Packed with screen shots and sample code, this book is ideal for game developers of all levels."

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• Why can't my jsp page read chinese chars from mysql? [migrated]

  - by Canking

  The mysql chars is utf-8, and the jsp page is also set to utf-8. I use the method: DriverManager.getConnection("jdbc:mysql://localhost:3306/jsptest?"+"useUnicode=true&characterEncoding=UTF-8","root",""); But it can not be use. When I insert Chinese chars into mysql and select it out, that would be proper functioning. The question is when I select some Chinese chars that I write into mysql at first, it would be all the "?" at the Chinese char place! Please watch the picture:

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• How can I add a Google search box to my website? [migrated]

  - by wahle509

  I am trying to add a Google search box to my own website. I would like it to search Google itself, not my site. There was some code I had that use to work, but no longer does: <form method="get" action="https://www.google.com/search"> <input type="text" name="g" size="31" value=""> </form> When I try making a search, it just directs to the Google homepage. Well, actually it directs here: https://www.google.com/webhp Does anyone have a different solution? What am I doing wrong?

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• How to remove a page from site without affecting google serp

  - by Savas Zorlu

  I have a travel website. Just for information purposes, I had put a weather page. Now I realize that this page is increasing my overall bounce rate; because people who are looking for the weather forecast are landing on that page and getting what they want and exiting. What is the safest method to get rid of that page? Would it hurt my google rank if I remove it completely? Or is there a better way to handle this situation? I realize that around 21 percent of my daily hits are on that page. I would have been happy if my aim was to provide weather data for the location; however, my site needs to focus on selling hotels. So I think I need to get rid of this weather page immediately. What do you think?

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• implementing a high level function in a script to call a low level function in the game engine

  - by eat_a_lemon

  In my 2d game engine I have a function that does pathfinding, find_shortest_path. It executes for each time step in the game loop and calculates the next coordinate pair in the series of coordinates to reach the destination object. Now I want to call this function in a scripting language and have it only return the last coordinate pair result. I want the game engine to go about the business of rendering the incremental steps but I don't want the high level script to care about the rendering. The high level script is only for ai game logic. Now I know how to bind a method from C to python but how can I signal and coordinate the wait time between the incremental steps without the high level function returning until its time for the last step?

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• Adding gesture recognizer (or dragging) to CCSprite

  - by user339946

  I'm trying to allow a CCSprite to be dragged across the screen. I've succeeded so far by doing it on a Layer level (from this tutorial). However, this only allows ONE sprite to be dragged at a time as the method implementation can only identify a single sprite to move at a time. I'd like to be able to perhaps add a gesture recognizer or somehow implement ccTouchesBegan/Moved in my own little CCSprite subclass. However, from what I understand, you can't just add gesture recognizers to CCSprites. ccTouchMoved are also not available on CCSprites?? Really confused as to how to implement touches on Cocos2D. What is the easiest way to add some position translation code to a CCSprite so it can be dragged around? Thanks!

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• How do you usually manage callbacks in Java using Swing library?

  - by none

  I'm quite new to the Java Swing programming, and GUI development as well. As a beginner, I'm currently reading Design Pattern, but finding what I'm looking for is quite hard, most of the times. So far, I've never had huge problems defining a view hierarchy - I just use to subclass component from component. But the hard-to-do here is how managing callbacks, which often become hard to maintain due to the hard code. During my last projects, I tried to separate GUI, Listener and Callbacker objects which cooperated together, but in this way it was really hard adding new features. So, which kind of best patterns or best practices do you tend to use when trying to maintain, add new features or even worst avoid to hard-code classes which manage callbacks method in this kind of frameworks (mainly Java Swing)?

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• Android game scrolling background

  - by Stevanicus

  Hi There, I'm just trying to figure out the best approach for running a scolling background on an android device. The method I have so far.... its pretty laggy. I use threads, which I believe is not the best bet for android platforms @Override public void run() { // Game Loop while(runningThread){ //Scroll background down bgY += 1; try { this.postInvalidate(); t.sleep(10); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } where postinvalidate in the onDraw function simply pushings the background image down canvas.drawBitmap(backgroundImage, bgX, bgY, null); Thanks in advance

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• How do I create stand alone packages from ubuntu repository

  - by tachyons

  Is it possible to create a stand alone deb packages by merging dependancies without manual repacking.?? I've looked at this question but it doesn't really answer what I'm trying to achieve above. if possible how to do it? update 1 No tools available yet(?) So what about creating new deb package containing all packages which will copy dependencies to the cache and executing main package. Is it possible? update 2 Above method appears to be impossible because dpkg cant handle more than one operation at a time. Some scripts may can do it update 3 this tool is very helpful but it currently wont support oneric and above still waiting for more generic tool Thanks in advance

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• How to Install Xampp on Windows XP

  To begin, visit the XAMPP for Windows home page, located at: http://www.apachefriends.org/en/xampp-windows.html. You will have several options for which flavor of XAMPP you wish to install, including the Installer, Zip, and 7zip versions. For simplicity's sake, this tutorial will use the simplest method: the installer. Click on the Installer link and you will be redirected to the program's SourceForge page. You may get a pop-up like the one below; if so, click Run: Next, you will be prompted to choose an installation language. Choose English (or whichever language you wish) and click the quo...

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• OpenGL: Drawing to a texture

  - by Danran

  Well im just a bit stuck wondering how to draw an item to a texture. Specifically, i'm using; glDrawArrays(GL_LINE_STRIP, indices[0], indices.size()); Because what i'm drawing via the above function updates every-frame, i'm just totally not sure how to go about drawing what i have to a texture. Any help is greatly appreciated! Edit: Well unfortunately my graphics card doesn't support FrameBuffer Objects :/. So i've been trying to get the copy contents from backbuffer method working. Here's what i currently have; http://pastebin.com/dJpPt6Pd And sadly all i get is a white square. Its probably something stupid that i'm doing wrong. Just unsure what it could be?

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• Java graphic objects as in flashgames

  - by Ryu Kajiya

  How is it possible (with the standard Java2D engine) to use small sprites like graphic objects? For those who don't know what I mean, in all those Flash-games like on Facebook they put small sprites on the screen which react to mouse-over and clicks. I tried to do the same in Java but can't find a good method. Swing components always spread over the whole bitmap, but I only want to get a reaction from the object when the mouse is over a pixel that's not transparent. So basically checking every time if the object below the mouse contains a non-transparent pixel (which i believe could be pretty intense in a gameloop or repaint loop). I have no idea how to implement such a thing efficiently.

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• Magento Subscription Form with Image upload

  - by Pankaj Upadhyay

  We have a peculiar requirement and our site is in magento. Requirement We want the user to fill in a personal information form with their image. After that, the user should be redirected to a product subscription page where he can select either 3 month, 6 month or on yearly basis. Now, when the selection is made, the user should make the payment via our payment method. How can I develop this? I am not able to figure it out. Should I go about editing the registration page or what? Let me know how you will deal with such a requirement?

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• Solaris 11 features: nscfg

  - by nospam(at)example.com (Joerg Moellenkamp)

  As you may have noticed many configuration tasks around name services have moved into the SMF in Solaris 11. However you don't have to use the svccfg command in order to configure them, you could still use the old files. However you can't just edit them, you have to import the data into the SMF repository. There are many reasons for this need but the ultimate one is in the start method. I will explain that later. In this article i want to explain, how nscfg can help you with with the naming service configuration of your system. Continue reading "Solaris 11 features: nscfg"

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• Should an image be able to resize itself in OOP?

  - by ChocoDeveloper

  I'm writing an app that will have an Image entity, and I'm already having trouble deciding whose responsibility each task should be. First I have the Image class. It has a path, width, and other attributes. Then I created an ImageRepository class, for retrieving images with a single and tested method, eg: findAllImagesWithoutThumbnail(). But now I also need to be able to createThumbnail(). Who should deal with that? I was thinking about having an ImageManager class, which would be an app-specific class (there would also be a third party image manipulation reusable component of choice, I'm not reinventing the wheel). Or maybe it would be 0K to let the Image resize itself? Or let the ImageRepository and ImageManager be the same class? What do you think?

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• Placing advice on any parameter of a given type in AspectJ

  - by user12558

  Hi, Im doing a POC using Aspectj. class BaseInfo{..} class UserInfo extends BaseInfo{..} class UserService { public void getUser(UserInfo userInfo){..} public void deleteUser(String userId){..} } I've defined an advice, that gets invoked when I pass an UserInfo instance.But when i try to pass the BaseInfo, the advice is not getting invoked. Below block executes the afterMethod as expected for getUser. &ltaop:pointcut id="aopafterMethod" expression="execution(* UserService.*(..,UserInfo,..))" / &gtaop:after pointcut-ref="aopafterMethod" method="afterMethod" / But when i try to give BaseInfo instead of UserInfo, the aspect is not getting triggered. Am i missing something? Kindly help me on this issue.

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• How Web Optimization Services Work to Increase Your on the Internet Reputation

  SEO is a symbol of search engine optimization and that is the key to success from the enterprise. No site has meaning if it seriously isn't properly promoted. Anytime any web surfer is in look up of any certain merchandise, providers or data he makes use of the easiest method of browsing as a result of search engine optimization and this is habit of many individuals to only search straight into 5 or six major sites for their goal. No person has time to seem directly into 100 pages of internet search engine as there is no need to have when he finds in major pages.

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• How to draw a texture to a MS Terrain object - Farseer

  - by Brad

  I'm using Farseer to make a game in XNA and I can't seem to figure this out. I've decided to use MSTerrain for making my game's terrain because I wanted destructible terrain and MSTerrain seemed like the best bet. Unfortunately, I'm stumped on how to actually show the terrain. When I generate the terrain it's visible in debug view, but MSTerrain does not have a Draw method, so I'm wondering how it is supposed to be drawn to the screen? Is it worth pursuing? I'm starting to think that MSTerrain is more trouble than it's worth, is there another better way to do this with bodies? I appreciate any help you can give. Thanks.

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• Is programming or computer science in general, all about algorithms?

  - by wakandan

  As a grad student, I find it more and more common for prestigious companies (like Google, Facebook, Microsoft,...) to put algorithm questions in their test and interviews. A few startups I applied to also asked about algorithms. I wonder if algorithms fluency is the most important thing for software developer in those companies? If the answer being yes, what are the best method or resources for one to learn & practice about algorithms effectively? I can't seem to get interested in solving seemingly too complicated problems found in most textbook or websites. Though easily understand basic algorithms (like quicksort, bubblesort,...), I find it immensely difficult to remember and reuse them later. Thanks. P/S: If you ask me what I like, it's building good softwares to solve users' problems innovatively. I suppose that does not necessarily mean the software has to be very complicated.

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• Recommended Linux distro to boot into RAM (from USB flash drive)?

  - by user91583

  I don't mind if I use USB flash drive or CD-ROM, but I would prefer USB flash drive. I had a squizz at http://en.wikipedia.org/wiki/List_of_Linux_distributions_that_run_from_RAM On my own computer, I would be able to use any of the distros in the list. The largest "RAM required" in the list is 4GB. I would like to be able to use it on any computer, so I suppose 1GB or less would be better. I tried to follow the method described on Distro that I can load into RAM? but the distro listed there, from Israel Remix Team, doesn't seem to be available. Before I start trial-and-error on different distros, does anyone have any recommendations?

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• What's the most productive coding environment

  - by Ubiguchi

  I was speaking with an ex-colleague the other day about the most productive way to write code and he said he found it best "to CIMP, or Code In My Pants". When I asked him exactly what he meant, he explained he found it best to work at home, coding at his own pace, dressed comfortably (in his pants), and communicating with his team through emails, IM, or the telephone. Digesting his approach (which he describes to clients as the Complete Integrated Method of Programming), I realised my coding is also more productive when working in an isolated environment, which made me wonder if the software industry has got it all wrong and should development be really done by dispersed teams of individuals, or are there advantages to geographical herding that make up for the added interruptions it brings? So has business got it wrong? Should development occur predominantly across geographically isolated individuals to increase productivity, or are there real reasons why herding developers together makes sense?

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• What's a good way to store a series of interconnected pipe and tank objects?

  - by mars

  I am working on a puzzle game with a 6 by 6 grid of storage tanks that are connected to up to 4 tanks adjacent to them via pipes. The gameplay is concerned with combining what's in a tank with an adjacent tank via the pipe than interconnects them. Right now I store the tanks in a 6x6 array, vertical pipes in a 5x6 array, and horizontal pipes in a 6x5 array. Each tank has a reference to the object that contains both tanks and pipes and when a pipe needs to be animated filling with liquid, the selected tank just calls a method on the container object telling it to animate the pipes it is connected to (subtract 1 from row or column to find connected pipes). This feels like the wrong way of doing it, as I've also considered just giving each tank references to the pipes connected to it to access directly.

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• How to separate and maintain customer specific code

  - by WYSIWYG

  I am implementing customer specific code and currently following simple approach like if (cusomterId == 23) do it. I want to separate out all the customer related code in separate place. But I have following problems. In code is in 1. Stored procs 2. Plain old classes. 3. Controllers 4. Views I came up with two solutions. First is to create table CustomerFunctionlity with columns CustomerId, FunctionalityName, method/Proc, inputs/outputs With this table I can simply check if exists, execute given function. Another way is creating a factory which returns customer related object for an interface. I am writting small end to end customer specific functionalities. How can I write maintenable code. Thanks

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