First of all you need to find a Java implementation for your specific
version of CE (do they still sell CE for different processors?) and
device. That Java version should best support Java 2 standard edition in
order to have Swing. There was an earlier version of Swing for older
Java versions, but it is limited. But frankly said, it is unlikely that
you will find a J2SE version for such a device. Usually you only get
some J2ME (micro edition) or Personal Java, not the full standard
edition, and no Swing. If you get a Java port at all.

The best source for a Java version would be your device manufacturer.
They should at least know if a third-party supplier has ported Java to
their device. If you are adventurous, you can port Java to the device
yourself :-)

/Thomas