Suppose I want to store many small configuration objects in XML, and I don\'t care too much about the format. The XMLDecoder class built into the JDK would work, and from what I
You should avoid XMLEncoder/XMLDecoder like the plague if you're going to be persisting a non-trivial number of objects or your system needs to be multithreaded. See http://matthew.mceachen.us/blog/do-not-want-xmlencoder-129.html for the grisly details.
If you must use XML, XStream is great. But ask yourself if you really need to use XML. Here's a serialization benchmark project that might turn you on to better solutions:
http://code.google.com/p/thrift-protobuf-compare/wiki/Benchmarking