serialization - How to handle Java.io.NotSerializableException -

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i have created java program works java i/o. have implemented serializable interface, still cause java.io.notserializableexception on following part of code while trying write objects file:

         oos.writeobject(ep);

how possible while implementing serializable? should works besides implementing interface?

usually means, object object trying serialize holds reference not serializable. if post code , exceptions stacktrace lot easier tell.


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