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Java Programming
Java Java Everywhere
Apr 5th
So, whether we like it or not, we all need Java! If you would like more information about the subject take a look at j2ee developer
Java, Java everywhere, it gets in your teeth, it gets in your hair – well it is everywhere, but far from being annoying it has become part of our technological world. Our modern devices use it though we may not even be aware of the fact.
It has been around since the middle nineties, and was first developed by Sun Microsystems.
To play on-line games you need Java, chatting globally over the Internet, on-line calculations, or seeing 3D images, and to do lots more things, you will need Java. Internet, Intranet you will find Java applications for e-business solutions
What is it? It is a programming language and computing platform said to be the underlying technology powering state-of-the-art programs, such as utilities, games, and business applications. It can be found on over 850 million PC’s earth wide, as well as billions of other devices, including mobile devices and TV devices.
Do You Need Java?
There are websites that just will not function properly without Java installed, and these are increasing daily. So it is a good idea to have it, and the good news is, it is a free download. The “Java Virtual Machine” is involved in web page interaction and is built right into the software you download. It is important for running Java applications. Of course if you use a mobile phone with web features and applications Java will be installed already.
JavaScript
One of the things JavaScript does is set and read cookies. These are small files that contain data related to a website you are on. They may be used to track different things such as the last time you visited a website, which advertisements you saw and items left in your shopping cart.
Why Java RDBMS?
Mar 26th
It is a well known fact that Java as a programming language set off a new paradigm in the software industry. Suddenly, every software programmer worth his salt was amidst software jargons like ‘Platform-Independence’, ‘Cross-Platform-Deployment’ and ‘The Java Virtual Machine’. In fact, it did not take long for Java to usurp the ‘most sought after status’ from many software languages, and become the most preferred tool for creating software; especially software for the web. As the recent trends in the industry show, Java is set to achieve an undeniable position as the most preferred software programming language for a long time to come. It is indeed Java’s credit that many prominent vendors who tried to emulate the capacities of Java, failed miserably in the endeavor.
The importance of Java in the software scenario has led to another major trend. Software vendors are either rewriting their existing products in Java, or are creating new products exclusively or partially in Java. This has led many analysts to question the need to port already existing applications to Java. While the prospects of porting small or medium sized software to Java may not attract concern, it assumes significance when we consider porting existing databases that could be handling millions of sensitive blocks of information. Similarly, experts also have to decide between deploying reputed databases, and new databases that have been entirely developed in Java, in their organizations. Analysts have to answer many pertinent questions like: What are the advantages of a Java RDBMS that would compel my company to switch to it? Would it be cost effective to change to an RDBMS that has all the advantages of Java? Would the costs involved in porting millions of existing records justify the perceived performance and scalability features of the Java RDBMS? How secure would be the new RDBMS? What is the learning curve that has to be tackled by the staff who may be assigned to this database? In fact, there are a host of questions that a concerned technical head may ask himself before taking that all important decision to switch to a Java RDBMS. Let’s try finding out some of the answers.
What are the advantages of a Java RDBMS?
OK, so we all know that Java is set to capture, or has already captured a sizeable chunk of the software market. However, how does that justify the use of a Java Database? After all, is not Java theoretically capable of integrating with any database? What advantages can be afforded by a Java RDBMS?
Well the answer is quite simple. Java RDBMS has, or supports, the much sought after qualities of Java, which is the most important reason to switch to it. Some of the Java RDBMS already available in the markets answers the immediate concerns of the Technical Lead in the most persuasive manner. For example, Daffodil DB, an RDBMS written in Java, considers the following as its core strengths:
Multiple Platform Portability
Small Size
Java Stored Procedures
Transparent to End User
Zero Administration Efforts
Some of these features are worth a second look.
One RDBMS, multiple avatars
Java RDBMS not only offers the advantages of Java, but also introduces new concepts that can revolutionize database programming techniques. For a start, the much famed portability of Java is the core strength of a Java RDBMS. Now, you don’t have to buy different RDBMS for different platforms within the same enterprise. Other than the cost factors, the biggest advantage such an arrangement can give is that in-house code need not be redesigned for different platforms. By standardizing the database that is used, programs working across platforms can interact transparently and effectively. Project managers would vouch that portability, synchronization and customization effort for software running on different platforms are some of the most time consuming and tension filled activities in the office. Now all these activities can be easily implemented with the Java RDBMS in its rightful place.
Store and use those procedures with abandon
Security buffs within the enterprise would always throw a tantrum when dealing with stored procedures. Traditionally, the implementation of stored procedures had been the responsibility of the specific application vendor, and most of them could crash the whole database due to internal errors, rendering precious time and money waste. Java stored procedures with its inbuilt security features is the new fad of security administrators who are finding it powerful, fast, and very safe. Java does not implement Pointers, and so is a safe bet for developers to write secure code and procedures. In addition, with the JVM overlooking all the activities (the sandbox approach), there is no scope for external access that could jeopardize mission critical enterprise applications.
Transparent to End User
Java technologies have always been in the forefront to give us seamless transparent applications with inbuilt security features being given the utmost importance. In a Java RDBMS, database components can be embedded in applications, and they can perform complex tasks without user intervention. In addition, the user need not know the complexities of the database because the embedded database components will do all the work for him without him even knowing about it. This allows the user to concentrate on his tasks rather than configuring databases, which is an auxiliary requirement. In addition, other routine activities like starting the server and repetitive configuring of the database can also be avoided. Perhaps the biggest advantage that Java RDBMS offers is that the user need not weigh the pros and cons about choosing a database vendor. This is because Java RDBMS being extremely portable can seamlessly integrate with almost all platforms, and the embedded components will handle all the chores of integrating with different vendor software. Java RDBMS can also be seamlessly operated across multiple platforms without the need to configure the database for each and every operating system.
Zero Administration Efforts
Java RDBMS comes in with zero administration efforts, which means that once installed and configured, your clients need not change their settings to suit new changes that you make in your database. Java RDBMS also does away with, or considerably reduces, the role of the Database Administrator because of its self-managed features, and its extremely scalable mode of operation.
If you have not thought of it yet, it is a good time to think about Java RDBMS. The time is not far away when the databases industry will be greatly influenced by the power and functionality of Java RDBMS.
By: Parveen Aggarwal
About the Author:
This article has been contributed by (Mr.) Parveen Aggarwal, Technical Consultant to DSL India. With more than 6 years of industry experience in Java and allied technologies, he has an in-depth understanding of J2EE, J2ME and database management systems. Parveen is currently working on the concept of data-archiving in embedded databases. He can be contacted at parveenaggarwal@hotmail.com
BlackBerry Programming 101 – How to Get Started With BlackBerry Software Development
Jan 10th
The success of newer BlackBerry models like the Pearl, Curve, Bold and Storm have allowed RIM (Research in Motion) to penetrate the consumer smartphone market and go head-to-head with the Apple iPhone as an application platform. If you’ve been ignoring the BlackBerry platform because it was too Enterprise-focused for your applications, it might be time to specifically target the BlackBerry. Here’s how you get started.
It’s Java Time
BlackBerry development for all recent models is done exclusively in Java. So if you’re not a strong Java programmer, now’s the time to brush up on your Java programming skills. (C# programmers will find the transition to Java fairly simple, the languages are very close in most respects.) Don’t learn about the newest Java features, however, because the BlackBerry platform is built on top of Java Micro Edition (Java ME), which is itself a derivative of Java version 1.3. So forget all the fancy (but useful) language features introduced in Java 1.5 — generics, enumerations, and so on — you can’t use these in BlackBerry programming. You can’t also use most of the library classes you’re familiar with — they’re just not there. A small subset of the Java Standard Edition (Java SE) classes are supported, as well as a number of BlackBerry-specific classes.
Java Micro Edition?
Once you’ve brushed up on your Java, you need to spend a bit of time understanding the Java ME platform, which was formerly known as Java 2 Micro Edition, or J2ME for short. You need to understand the concepts of configurations and profiles, and in particular the CLDC and MIDP standards. You’ll find lots of information about these in various books and on Sun’s Java development site.
The BlackBerry Platform
After learning about Java ME, it’s time to explore the BlackBerry platform. The BlackBerry platform is based on the CLDC and includes support for MIDP 2.0. However, a large number of BlackBerry-specific classes are also provided. Which brings you to the first question you’ll face: are you going to write a BlackBerry application or a MIDP application? In a MIDP application you’re constrained to only use the APIs exposed by the CLDC and MIDP standards. Your application will run on the BlackBerry and on most cellphones, but it won’t be able to use any of the BlackBerry’s special features. You can use any MIDP-compatible development tool, such as the Sun Java Wireless Toolkit for CLDC (formerly known as the J2ME Wireless Toolkit), to create your applications.
Most application developers opt to build BlackBerry-specific applications. This means learning the BlackBerry-specific APIs — including new user interface classes — and using the BlackBerry Java Development Environment (JDE) to develop your applications. The JDE, which is free to download, works with the standard Java Software Development Kit and provides you with all the tools necessary to create, package, test and debug BlackBerry applications. You don’t even need a BlackBerry handheld, because the JDE includes a full-featured BlackBerry device simulator. A complete set of JavaDocs is provided that describes all the classes and interfaces available to programmers.
After downloading and installing the JDE, you’ll want to read the developer’s guides that come with the JDE and look at the sample applications that are shipped with it. Then start your development by writing a few simple applications to get a feel for the BlackBerry APIs and the tools.
Get A BlackBerry Handheld
Although you can develop and test your applications for free, at some point you’ll need to run the application on an actual BlackBerry handheld. This will cost you money, of course, and so it’s not something you’ll want to do until you’re serious about writing BlackBerry applications. On-device testing is crucial to ensuring that the application works correctly, because the simulator is not a perfect emulation system.
If you’re truly serious about BlackBerry application development, consider also joining one of the BlackBerry developer programs for additional support and early access to new devices and APIs. You should also explore RIM’s other BlackBerry developer resources. There are also third-party forums and books available to help you learn the BlackBerry platform.
Conclusion
BlackBerry programming is not hard if you know some Java and you understand the constraints and limitations of the underlying Java ME platform. You have to learn a new set of APIs and use new development tools, but in the end it’s just another kind of Java programming.
By: Eric Giguere
About the Author:
Programming With Semantic Web Languages
Oct 7th
Semantic Web Languages can be a useful programming tool, and be used for creation and editing of E-Learning objects (Stutt and Motta, 2004). For enabling User Driven Programming, it’s necessary to experiment with using Semantic Web Languages as programming languages. The two main approaches that can be used are:-
Option 1 – To put all the data in Semantic Web languages e.g XML (eXtensible Markup Language) (W3C, 2007a), SVG (Scalable Vector Graphics) (W3C, 2007c), RDF/XML (Resource Description Framework) (W3C, 2007b), OWL (Web Ontology Language) (Bechhofer and Carrol, 2004), and then display them using a programming language such as Flash, or Java (applets) – (Hale, 2007a).
Option 2 – To use the above languages as meta languages for actual programming – (Hale, 2007b).
It is also possible to use aspects of both approaches, such as to program mainly in Semantic Web languages, then add some extra interactive capabilities using JavaScript. It is becoming increasingly practical to program completely in the Semantic Web languages (option 1). These languages enable declarative programming, where we tell the computer what we want to do, and a translation is performed either using languages such as JavaScript or Java, or into JavaScript or Java. This is different from the AJAX (Asynchronous JavaScript and XML) approach, which is more like option 1.
The advantages of this (option 2) form of declarative programming are that we can use a language that is at a much higher level of abstraction, closer to the way people think. It’s possible to create these programs by editing them in Protege (ontology editor) and using a translator to convert them to whatever code is needed. This makes it possible to perform visual programming in a meta language (OWL) Web Ontology Language (option 2), without needing to worry about how it’s implemented. The possibilities for this are that it becomes sufficiently intuitive, so that people can eventually create their own software for a wide variety of tasks, in a point and click way and using similar tools to web page editors. This would enable anyone who is computer literate to program the computer themselves to do their tasks, and if this is of interest to others, they can release their solution over the web.
Technologies such as XForms (Bruchez, 2006), XQuery (W3C, 2007e), and SPARQL (W3C, 2007d) make it possible to provide the sort of collaborative interactivity that Tim Berners-Lee calls ‘Intercreativity’ in Weaving the Web (Berners-Lee, 1999). In this book he also discussed the use of Semantic Web Languages as programming languages. He makes the point that it isn’t the power of the language that is important in providing this intercreativity. The simplicity of a language such as RDF makes it easier to provide interconnected solutions to complex problems, without becoming bogged down with the complexity of the language itself, and interoperability problems. Tim Berners-Lee sums up the advantage of a Semantic Web program over programs in other languages. He writes “The advantage of putting the rules in RDF is that in doing so, all the reasoning is exposed, whereas a program is a black box: you don’t see what happens inside it.” If these rules are also visualised, they are exposed to everyone, including non-programmers.
These advances make it practical to develop a high level visual interface that can allow people to develop open source, open standard, interoperable programs and share them. This can allow the development of open source communities similar to those developing software currently, but only requiring the level of skill it takes to get started in visual collaboration tools such as MySpace.
In Weaving the Web Tim Berners-Lee writes “The Semantic Web, like the Web already, will make many things previously impossible just obvious”. Visual Semantic Web programming is one of those obvious things.
References
Bechhofer, S., Carrol, J., 2004. Parsing owl dl: trees or triples?. In: Proceedings of the 13th international conference on World Wide Web, NY, USA, pp 266-275.
Berners-Lee, T., Fischetti, M., 1999. Weaving the Web. Harper San Francisco; Paperback: ISBN:006251587X – http://www.w3.org/People/Berners-Lee/Weaving/.
Hale, P., 2007. http://www.cems.uwe.ac.uk/~phale/Flash/FlashHCI.htm.
Hale, P., 2007. http://www.cems.uwe.ac.uk/amrc/seeds/PeterHale/SparMenu.html.
Stutt, A., Motta, E., 2004. Semantic Learning Webs. Journal of Interactive Media in Education, 2004 (10). Special Issue on the Educational Semantic Web. ISSN:1365-893X – http://www-jime.open.ac.uk/2004/10.
World Wide Web Consortium (W3C), 2007. Extensible Markup Language (XML) http://www.w3.org/XML/.
World Wide Web Consortium (W3C), 2007. Resource Description Framework (RDF) http://www.w3.org/RDF/.
World Wide Web Consortium (W3C), 2007. Scalable Vector Graphics (SVG) XML Graphics for the Web http://www.w3.org/Graphics/SVG/.
World Wide Web Consortium (W3C), 2006. SPARQL Query Language for RDF http://www.w3.org/TR/rdf-sparql-query/.
World Wide Web Consortium (W3C), 2006. XQuery 1.0: An XML Query Language http://www.w3.org/TR/xquery/.
By: Peter Hale
About the Author:
I am a Researcher in the final year of my PhD. I specialize in applying Semantic Web techniques. My current research is on a technique of ‘User Driven Modeling/Programming‘. My intention is to enable non-programmers to create software from a user interface that allows them to model a particular problem or scenario. This involves a user entering information visually in the form of a tree diagram. I am attempting to develop ways of automatically translating this information into program code in a variety of computer languages. This is very important and useful for many employees that have insufficient time to learn programming languages. I am looking to research visualization, and visualization techniques to create a human computer interface that allows non experts to create software.
I am a member of the Institute for End User Computing, and the British Computer Society.
Web Designing and Web Programming
Aug 12th
Web programming is a general term used for any development work for an Internet or World Wide Web. In the mid 1990s, web programming has been one of the top industries worldwide. There were over a thousand of web development companies in 1995 however it rises up to more or less 30000 companies by 2005. It is expected to grow more this year increasing 25% or more. As regard to the increasing number of programming companies, the cost of Web site modification is has depreciated dramatically this time. But, people still accept jobs like this because of its high demands in the society. Web tools include Java Platform, Enterprise Edition technologies and Microsoft.NET to enable the Web to bridge the application running online. Web programming entails computer programming of internet languages, designs and a lot of web technicalities.
Web Programming Language
Each programming task requires available and suitable language. There are several languages that can be used in computer programming. No single language can dominate the Web scenario. Java is both generally suitable and available but not all would likely to choose it over other languages. HTML is the simple language understood by every WWW clients. This can operate under windows, Mac or Unix workstation.
Website Design
How will your web works matters with how good it is designed and programmed. Latest technologies are used by experts for fast and functional and websites with great appearance. New designs provide animations, flashes and imagery that are interesting. However, web programmers are not yet satisfied with what they created last year and continue to modify to deliver quick and beautiful web style.
Advantages
Development of modern technology can save time and effort. Through electronic payment, printing capabilities, information gathering and browsing for new trends are only a click or two. Through web programs, everything is easy and available. Money is also saved through rise of web programs. Software and servers are available in low cost with free trials, required support licensing and updates. Electronic submissions, scheduling support and other time and money consuming works before have no extra charges and long time processing. Communication is also another plus point for programming. Instead doing executable code on a computer, through web, users interact using online applications to make new content. This allows opportunities to transfer information from one server to another. Fun sites such as Facebook and Twitter make people connect globally. There are a lot of features like games, blog and chat for entertainment and convenience.
By: Saso Pogorelc
About the Author:



