After a couple of fruitless days trying to solve this problem, I
now turn to
my most trusted resource: this list.
I'm using Java 1.5.0 and Netbeans 5.0. I'm running on Mac OS X
1.4.7, with a
G5 dual processor PPC (1.8GHz.)
I've created a rather complicated object which takes a very long
time to
instantiate. My application needs several of these objects, and the
wait
time to create them all is unacceptable. I don't understand what the
performance issue is yet, but I thought of this workaround:
Instantiate the object once, and save it to a file as a serialized
object.
Then read the object from disk, rather than construct it, as many
times as
needed.
I did this for an applet doing Soundex lookups. I serialized some of
the data for performance reaons. In one instance I got both size and
less
code savings. In another the code I think got a little larger but it
should still not need to do the many required initializations.
I don't know if this will be time-effective because I'm getting an
error
when I try to write the serialized object to disk.
You're trying to serialize Swing, specifically the aqua L&F, which is
not serializable as it is. I have successfully serialized my own gui
with some slightly involved code. It does tend to be a bit brittle
since the code is making no attempt to provide working serialization
from release to release. And it still wouldn't do you any good on
another platform. Although I hide or substitutes for most of the
really un-serializable parts what remains is still OS X specific.
Somewhere in the depths of my to-do list is attempting to come up
with a platform neutral mapping API for Swing. This would allow the
actual non-serializable L&F to be generated on each platform rather
than serialized as is.
Possibly using XStream or some other XML based persistence format.
If you are really serious in trying to serialize some part of the
Aqua L&F right now you could contact me off-list and I could provide
more details on my serialization tricks and hacks.
Metal I believe is the only L&F that is guaranteed serializable.
Although I don't see how you could quite get it to serve the mapping
function I'm imagining without visually changing the current
components appearance which I think would be pretty disconcerting to
the user.
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