@java-class serialization

[Mick]

Hello,
I must use my class pointed in IDL file as a field type:
record rec{
    @java-class("com.acme.MyClassImplementingSerializable") string field1;
}

Is it enough if the `java-class` implements serializable to send 
`field1` using RPC or do I have to write eg toString method?

Thanks for answers.