anonymous class not serializable
Spent a while tracking down a serializable error. Took me a while to discover that anonymous classes are not serializable, even if they are implementing an interface that extends serializable. Wasn’t really a problem from me but did take a while to find.
[Ljava.lang.Object cast errors
This turned out to be a really simple thing. I was trying to cast an object to something else. I had received an object in good faith from an xml rpc call. It was supposed to contain a List of stuff but I kept getting casting errors that talked of being unable to cast [Ljava.lang.Object to what ever it was I wanted. I went out of my mind trying to find out what was wrong.