SAX Vs DOM

[kri shan]

Difference between SAX and DOM parsers?

[William Brogden]

That is the kind of question you should be able to answer for yourself with existing web resources. For instance, a google search for "java xml tutorial" will turn up this Sun tutorial on XML in java.
Bill

[Lasse Koskela]

IBM developerWorks also has nice tutorials for learning SAX and DOM:
Understanding SAX
Understanding DOM