Here, I described about benefit of XML language. Corporates are increasingly moving from the classic Client/Server two-tier application models to the three-tier model. The browser acts as a front end, and interacts with a middle-tier web server, which in turn communicates with a back-end database server for storage. This three-tier architecture has several benefits over two-tier architecture, including easier scalability and better security. XML will make possible richer implementation of such models through structured data exchanged over HTTP. The benefits of XML can be classified into the following: 1) Bussiness benefits of XML 2) Technological benefits of XML 1) Business benefits of XML The various business benefits of XML are as follows: • Information Sharing The XML can be used facilitate business. It is one of the greatest benefits of XML. XML allows businesses to define data formats in XML, and easily build tools that read data, write data and transform data between XML and other formats. This has allowed a number of businesses and industry consortiums to build standard XML data formats. Areas such as Electronic Data Interchange (EDI), inter-bank payments, supply-chain, trading and document management are all the subjects of ongoing XML-based standardization undertaken by industry consortiums. The ability to link enterprise applications is a key focus for many companies, and has produced cost savings and increased revenue for many enterprise customers. In particular, many businesses aim to improve Customer Relationship Management (CRM) by creating a single logical view of each customer across multiple existing systems. XML is an important technology to create this single customer view. Furthermore, because XML makes it easy to relate structure to content, XML subsets can be defined with specific industries, or applications in mind. For example, XML has been used to define standard data formats for the banking industry. In the same manner, a standard could be developed specifically for flight booking systems, thereby allowing airlines to easily exchange information. • Single application usage The business benefits of using XML within a single application are less compelling, but they are very easy to achieve, and so we have a number of applications that use XML internally. XML is a very powerful and flexible language for describing the complexities of the real world. Since XML can describe complex data, it means that it can be a powerful tool for creating new applications. The extensibility of XML means that the application can grow and develop without major changes. XML allows businesses to define data formats in XML, and easily build tools that read data, write data and transform data between XML and other formats. • Content Delivery XML has a number of key benefits for content delivery. The main benefits are the ability to support different users and channels, and to build more efficient applications. Channels are information delivery mechanisms, for example, Digital TV, Phone , the Web, and multimedia kiosks. Supporting different channels is an important step in delivering e-business applications to customers through their chosen medium. XML is a key technology for this. For example, a customer and a supplier both need to access the same on -line product catalogue. Although the information is the same, the visual emphasis will differ, depending on who the user is. The customer will be more interested in looking for information on functionality, pricing, and availability, while the supplier will want to have easy access to catalogue maintenance and inventory information. All this information might be stored in a single XML document and be displayed differently by the application. Using XML for content delivery has been limited by the non-availability of XML-enabled browsers. 2) Technological benefits of XML The Technological benefits of XML are as follows: • Re-use of data The librarian could re-use the publisher’s data, because it is in a common format, and we could also re-use the data when we built our meta-catalogue. Of course there are many common file formats in the world of computing that have allowed data re-use. There have usually been proprietary and application specific. XML is neither application specific nor proprietary. • Separation of data and presentation If we compare five years old Web sites, with the ones at present, they have changed a lot. Any successful Web site will probably have at least one redesign a year. That is not simply to cater to latest trends. Successful Web sites analyse and react to feedback from users, and redesign the site to be more productive and intuitive. Let us return to the example of the library Web site. This Web site is also redesigned, but the underlying data remains in place. So it makes sense to separate the data output from the Web site design. There is still another, even more compelling reason to separate data and display, which is the rise of pervasive computing. Pervasive computing takes place when computing devices become integrated into common everyday appliances, for example, mobiles, televisions, printers, and palm computers. Each of these appliances may have a different display technology, and require different instructions on how to display the data. The same search of the library catalogue should be viewed on a mobile phone or a high-resolution PC. This can be achieved by using XML. • Extensibility HTML has been a constantly evolving standard since it emerged. One of the problems it has faced, is that companies wishing to go beyond HTML, have often extended it. Browser suppliers regularly add non-standard extensions to HTML. Similarly web server manufacturers build “Server-side” extensions to HTML. These include Microsoft’s Active Server Pages, Java Server Pages, and many others. This has led to many confusing variants of the HTML standard, causing difficulties for Web developers, tools vendors, and ultimately for end-users. As the name implies, extensible Markup Language was designed from the beginning to allow extensions. If we go back to our example of the library, when the books were first indexed, the Web did not exist. Probably the library catalog has no references to Web sites in it. Nowadays, many books have a companion Web Site, and the librarian may wish to reference it. If XML were used to develop the catalog, then this could easily be accomplished. Importantly, with XML, old software is not disrupted by the addition of new information. • Semantic Information The final major benefit of XML is that it builds semantic information into the document. Semantic information (or meaning) is what allows readers to decide whether the book is about the color brown, or written by Brown. An HTML-based Web search engine cannot do that, because it cannot distinguish between the title and author in the document, there isn’t enough semantic information in the HTML page. With XML, the document includes self-descriptive terms that make it possible to know what the meaning of the document,is. • Other benefits The other benefits of XML are, that it is human-readable, tree-based, and is easy to write program. As time goes on, a large number of XML tools will emerging from both existing and new software vendors. It is human-readable, because it is based on text and simple customised tags. The tree-based structure of XML is much more powerful than fixed-length data formats. Because objects are tree structures as well, XML is ideally suited to working with object-oriented programming. In particular, many people believe that there is an excellent affinity between Java and XML. Lastly, XML is easy to program, because there are already standards for XML parsers. XML parsers are the subsystems that read XML, and allow programmer to work with XML.

Language B is the father of language C, and language C is the father of C++. And it is also true that son is always one step ahead of his father and the same is here also. This statement will be said when the register of record, of Computer will be written. However, these languages created stages to evolve Java as the outcome result. Understanding Java needs to the reason of its invention that forced the people to create JAVA Language. We see that, JAVA is the found everywhere in mobile computer and the most important is the Internet application. Many applications on the Internet need JAVA Software to be installed on your computer. Like any other successful language JAVA is mixed together with the best components that fits the use of JAVA and the main purpose of this language requirement.

What has make Java so important? Here is the answer- JAVA has a connection with the online Internet World. Also remember that- JAVA is the first programming language in the Internet environment.

Why there is a need of new method of computer language and development? Here is the answer- Due to the market environment change and to give a quality product to the beautiful people and it will be only achieved by doing refinements and improvements in the science of programming.

As we know that the JAVA is the son of the C++ and C++ is the amendment in C. So it is necessary that JAVA will have many characteristics same as that of C++ and C. JAVA has the syntax from C and object oriented feature are inherited from C++. It is true that many of the java characteristics are inherited from its predecessors. However, the creation of java language is mainly for the refinement and adaptation process and this is present in the computer programming language from the past three decades.

 

 

Unlike most other computer languages, java provides built-in support for multithreaded programming. A multithreaded program contains two or more parts that can concurrently. Each part of such a program is called a thread, and each thread defines a separate path of execution. Thus, multithreading is a specialized form of multitasking. You are certainly acquainted with multithreading, because it is supported by virtually all modern operating systems. However, there are two distinct types of multitasking – process based and thread based. It is important to understand the difference between the two. Process based multitasking is the more familiar form. A process is, in essence, a program that is executing. Thus, process-based multitasking is the feature that allows your computer to run two or more programs concurrently. For example process-based multitasking enables you to run the java compiler at the same time that you are using a text editor. In process based multitasking a program is the smallest unit of code that can be dispatched by the scheduler.

In a thread-based multitasking environment, the thread is the smallest unit of dispatch able code. This means a single program can perform two or more tasks simultaneously. For instance, a text editor can format text at the same time that it is printing, as long as these two actions are being performed by two separate threads. Thus process based multitasking deals with the “big picture” and thread based multitasking handles the details.

Multitasking threading requires less overhead than multitasking processes. Processes are heavy weight task that requires their own separate address space. Interprocess communication is expensive and limited. Context process from one switching to another is also costly. Threads, on other hand are light weight. They share the same address space and cooperatively share the same heavy weight process. Inter thread communication is inexpensive and context switching from one thread to next is low cost. While java program make use of process based multitasking environments, process based multitasking is not under the control of java. However, multithread tasking is.

Multithreading enables you to write very efficient program that make maximum use of CPU, idle time can be kept minimum. This is especially important to interactive, networked environment in which java operates, because idle time is common. For example, the transmission rate of a data over a network is much slower over the rate that which computer can process it. Even the local file system resources are read and written as much slower pace than they can be processed by the CPU. And of course user input is slower the computer. In traditional single threaded environment your computer has to wait for each tasks to finish before it can proceeds to the next one-even though the CPU is sitting in the idle most of the time. Multithreading lets you to gain access you to the idle time and lets you to make best use of it.

If you have programming for operating systems such as windows 98 and windows 2000, then you are already familiar with multithreading programming. However, the fact that java manages threads makes multitasking especially convenient, because many of details handles by you.

 

HI friends, today I am going to inform you about how to install and uninstall application. Though you can do a lot with the programs and features that are included in Windows, but you will probably want to install other programs.

How you add a program depends on where the installation files for the program are located. Generally programs are installed from a CD or DVD, from the Internet or from a network.

To install a program from a CD or DVD

Insert the disc into your computer and then follow the instructions on your screens. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. Many programs installed from Cd's or DVD's will attempt to launch an install wizard for the program automatically. In these cases, the AutoPlay dialog box will appear and you can choose to run the wizard. For more information, see Auto play frequently asked questions. If a program doesn't begin to install, check the information that came with the program. This information will likely provide instructions for installing the program manually. If you cannot access the program's information, you can also browse through the disc and open the program's setup file, usually called Setup.exe or install.exe.

Uninstall or change program

You can uninstall a program from your computer, if you no longer use it or if you want to free up space on your hard disk. You can use programs and features to uninstall programs or to change the program's configuration by adding or removing certain options. Open programs and features by clicking the start button, clicking control panel, clicking Add & remove programs and then clicking change or remove. That's it and you are done.

Tips -- Always make sure that your computer meets the requirement of the program that you want to install and go through the read me instructions carefully. Finally, after installing the program if your computer prompts you to reboot go for it.