You can’t serialise a class that doesn’t implement Serializable
, but you can wrap it in a class that does. To do this, you should implement readObject
and writeObject
on your wrapper class so you can serialise its objects in a custom way.
- First, make your non-serialisable field
transient
. - In
writeObject
, first calldefaultWriteObject
on the stream to store all the non-transient fields, then call other methods to serialise the individual properties of your non-serialisable object. - In
readObject
, first calldefaultReadObject
on the stream to read back all the non-transient fields, then call other methods (corresponding to the ones you added towriteObject
) to deserialise your non-serialisable object.
I hope this makes sense. 🙂