I usually use JavaLoader too when working with java libraries as it’s more flexible, but you should be able to use CreateObject() directly with the complete batik distro in a folder within your code base as Zac suggests. Just add the path to the distro folder as the third argument:
Batik = CreateObject( "java", "org.apache.batik.transcoder.image.PNGTranscoder", "batik/" ).init();
This assumes a file structure of:
- root/
- batik/
- script.cfm