There is no way how to create DataFlavor for array class type object, with another mime type than application/x-java-serialized-object.

I guess I already filled a bug, about more convenient constructor allowing to specify representation class also for other mime types like: application/x-java-jvm-local-objectref.

I used trick which works for non-array classes, i.e.:

new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + "; class=java.lang.Object", null);

but the same tactic doesn't work for array type:
new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + "; class=[Ljava.lang.Object;", null)

where the last semicolon (;) which is necessary to specify the class name for array types is always trimmed in mime type parsing, thus it leads to ClassNotFoundException when constructing such DataFlavor.