Too big XML file to parse

Question

I have this big xml file which is 13MB which I am trying to parse by Java. The problem is that I get the message
java.lang.OutOfMemoryError: Java heap spaceI am loading from xml file as following:
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse (new File("xmlGeneSynonyms.xml"));  //Here I get problem!!!Do you have any suggestion how I can work this out?
thanx

Answer 1

I agree with the poster who said SAX may be a better choice. 13 MB, though (probably) smaller than the memory space of your machine, is still going to take a while to parse & build the nodes in memory. Unless you are going to keep the parsed XML tree in a memory for a LONG time and do a LOT with it, SAX is likely a better choice.
With SAX, you just parse a little at a time until you find what you're looking for, then quit. This would be a better wa to go, for example, if want only few parts of the 13 MB document.
And how many 13 MB documents do you have? If more than just one or two, you're going to take a huge performance hit by trying to parse each one & stuff the whole thing into memory if you're only interested in a small part of it.