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JDOM, The Java DOM

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Using XML with Java is amazingly simple: All you need is a JDK, some free class libraries, a text editor and some data to process. The Document Object Model (DOM) is a popular, standardized way of manipulating XML data. Java developers might prefer JDOM in the future, a more Java-oriented API for reading and writing XML Documents.

JDOM was created by Brett McLaughlin and Jason Hunter as an open source project, available from the JDOM site.

• DOM criticism
• DOM and JDOM head-to-head
• Comparing the SAX, DOM and JDOM ways
• JDOM summary

What's wrong with the W3C DOM?

• The DOM makes very limited use of the Java class library. Many features have been reinvented, for instance creating a NodeIterator instead of using java.util.Iterator.
• Some areas have a weak design. Method overloading is not used because not all programming languages support it, for instance JavaScript.
• Named constants are often short integer instead of constant objects.
• There is only one kind of exception, details are provided by constants instead of having an exception class hierarchy.
• No Java-specific utility methods like equals(), hashCode(), clone(), or toString() are defined.
• Unexpected behavior can result in that the value of a non-empty element is defined to be null, raising the widely popular java.lang.NullPointerException. Some DOM implementations also allow the creation of malformed documents.
• Parser independent interfaces are implemented by parser specific classes, and most programs must use these parser specific classes. Sun's API for XML Parsing JAXP helps solve this, but so far only for DOM Level 1.

The DOM and JDOM head-to-head...

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Created: Dec 03, 2000
Revised: Dec 03, 2000