Les exceptions et les bonnes pratiques Bien souvent, un programme doit traiter des situations exceptionnelles qui n'ont pas un rapport direct avec sa tâche principale. Ceci oblige le programmeur à réaliser de nombreux tests avant d'écrire les instructions utiles du programme. Cette situation a deux inconvénients majeurs : Le programmeur peut omettre de tester une condition ; Le code devient vite illisible car la partie utile est masquée par les tests. Java remédie à cela en introduisant un Mécanisme de gestion des exceptions qui est l'objet de cet article. Une situation exceptionnelle peut être assimilée à une erreur (dans le cadre de cet article), c'est à dire une situation qui est externe à la tâche principale d'un programme. Les erreurs graves qui causent généralement l'arrêt du programme et qui sont représentées par la classe java.lang.Error . Toutes ces classes héritent directement ou indirectement de la classe java.lang.Throwable. IV-A. Comme prévu, on obtient bien l'affichage :"Une exception est survenue" . IV-B.
An introduction to the SOLID principles of OO design - dave^2 = -1 I would be very hard pressed to go passed Robert "Uncle Bob" Martin’s SOLID principles as the single most useful tool for helping me with OO design. Some people seem to have a natural talent for OO design and thinking, and have an innate understanding of these principles without requiring the SOLID formalism. I, on the other hand, find them indispensable. Unfortunately the names used in the somewhat-cryptic "acronym of acronyms"[1] don’t exactly lend themselves to being easily learned (Bob Martin and Scott discussed how this came about on a Hanselminutes episode on SOLID, which is well worth a listen). I thought I’d post my interpretation of the principles as a refresher for myself, and as an introduction for anyone trying the learn the terminology. I should point out I am far from a guru on this stuff, so if there’s any misinformation in here please point it out in a comment or email, so I can correct the post and learn me some OO :). Single Responsibility Principle Open Closed Principle
Development Testing SELEX-ES wanted to eliminate software defects early in the SDLC. Learn how Parasoft static analysis helped them increase reliability while reducing reduced development time, costs, and resources. To read more, download PDF By applying Parasoft solutions to its Integrated Tramway Management Solutions project—then later deploying it across the entire Automatic Vehicle Location System division—Thales Italia reduced its rate of defective components by 30% and significantly increased application performance. To read more, download PDF By working with Parasoft , IMA significantly increased the efficiency and auditability of the strict quality process they adopted to comply with pharmaceutical industry regulations. With the constant introduction of new APIs and services, Siemens must ensure their applications are smartly integrated with the back-end infrastructure and are diligently maintained to avoid errors or system shutdowns.
Programming the Arduino with Eclipse on Linux | Using Android in Industrial Automation This is the first of a series of three posts. The ultimate goal is to setup a communication interface between an Arduino Uno/Mega board and an Android tablet over USB. Everything will be as user-friendly as possible, i.e. no root will be required on your Android tablet. The Arduino Uno is a popular and affordable hardware platform which comes with its own IDE and core libraries for programming. Install avrdude and AVR libraries:sudo apt-get install gcc-avr avr-libc avrdudeStart Eclipse and install CDT Plugin (C/C++ Development Tools): Help -> Install New Software…Work with: (your current Eclipse version)i.e. For the Arduino Mega 2560 you should choose Atmel STK500 Version 2.x firmware as Programmer Hardware, and ATMega2560 as target hardware, the rest is the same as with the Arduino Uno. Update: if you are using Eclipse Indigo, some specific AVR symbols such as DDRB (data direction register of port b) may not be recognized.
The AVR GCC Toolchain - AVR-Eclipse From AVR-Eclipse Within the context of the AVR Eclipse plugin the word AVR-GCC toolchain is used quite liberally for all tools and files required to develop and deploy applications for AVR processors with this Plugin. Actually these tools come from seperate sources, of which the real avr-gcc is only one. Toolchain components These are the items that make up the AVR-GCC toolchain: At the core of the avr-gcc toolchain and absolutely required to build AVR applications, are the compiler, the binutils collection and the libc library. Patches Since the GNU Project serves a much greater community than just the AVR folks and its stability is critical to the stability of the entire open software community, the avr-gcc developers have elected to publish AVR specific bugfixes and improvements as patches to the baseline distributions of gnu tools. Most of these patches are maintained as part of the FreeBSD ports collection. Windows Linux Most Linux distributions have an AVR-GCC toolchain. RedHat Fedora Suse
Eclipse Below is explanation how to setup Eclipse with WinAVR and the Eclipse plugin AVR-eclipse. There is an easier 100%free and opensource way to use Eclipse. For details see Eclipse is a free, powerful, and full-featured development environment that can be set up to work with AVR and Arduino. PlatformIO is free and open-source cross-platform code builder and library manager. All instructions are described in the main documentation Integration PlatformIO with Eclipse IDE. Integration PlatformIO with Eclipse IDE Navigation Installation Eclipse and additional plugins Eclipse IDE for C/C++ Developers: You can also just add the C Development Toolkit to an existing installation. Notes openSUSE There are no current packages, but it's easy to install as per above. GNU AVR-GCC toolchain Mac OS X Add repository for your version. zypper -v ar -k -f Install packages. Windows