JAVA AND XML FOR DUMMIES BARRY BURD PDF

Java and XML are the foundations of a new generation of applications and Web services. The XML registry lists more than a hundred XML data formats, including ones for financial data, health care, arts and entertainment, human resources, multimedia, and many other domains. Java runs as bytecode on a virtual machine. When you go from a.

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Java and XML are the foundations of a new generation of applications and Web services. The XML registry lists more than a hundred XML data formats, including ones for financial data, health care, arts and entertainment, human resources, multimedia, and many other domains.

Java runs as bytecode on a virtual machine. When you go from a. To run the. And versions of the Java Virtual Machine are available for at least 20 different operating systems.

Java is based on object-oriented programming technology. Java code is reusable. You can call methods from existing classes, extend classes, or stretch and bend classes to meet your specialized needs.

If someone writes a wonderful XML-handling package in Java, and the package has bits and pieces that you can use in your own work, you can import the package and extend the classes to solve exactly the problems that you need to solve. This cooperative model works both ways. When you create a package for your own anticipated needs, other developers can adopt your package, enhance your package, and spread the good word about your code. Taken together, these factors eventually ensure that software written in one environment can run in all other environments.

Instead of reinventing the wheel, programmers reuse the wheel. This ideal — the seamless integration of parts from many sources to build large, reliable software systems — has been the Holy Grail of computing for the past several decades.

Now portable code and portable data put the ideal within reach. Java and XML work well together. Taken together, Java and XML form the virtual equivalent of a well-oiled machine. Much of the code created for processing XML is written in Java. A whopping 47 utilities were written in Java. Clearly the XML developer community has an investment in Java — for many good reasons, of which the likely best one is that both Java and XML are streamlined for the Internet.

Since its humble beginnings in the s, Java has been an Internet-ready language. When it first hit the scene, Java was viewed primarily as a tool for building applets and other Web-client applications. This package contained support for URLs, sockets, authentication, and other necessities of network coding. As time went on, people saw more and more uses for server-side Java. The whole push for XML has been based on the desirability of sharing of data.

The infrastructure for the exchange of data becomes the entire Internet. Starting with version 1. These packages help solidify the bond between Java and XML.

He also trains professional programmers and speaks widely at conferences.

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This code checks the document structure as it runs. When the code finds a child node, it scans the child and looks for grandchildren. If there are no grandchildren, the code looks for brothers and sisters. The code can handle any document tree — whether it has one node or a thousand nodes. Thus, Listing 2 is more versatile than Listing 1. However, this versatility comes with drawbacks — including the possibility of very high overhead. If the document is very large, then the representation is large: Memory gets bloated with all that temporary data, and the code in Listing 2 slows to a crawl.

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