object can pass in network from one place to other

in Java if you want to store java object for life time you
need to serialize it by implementing it class be serialiazable
interface.
    So that you can access lifetime it it is stored somewhere.

by using serialization we can pass some amout of data from 
network to another network or one layer to another layer .. 
and also we want use object with running JVM by use 
serialization consept we can use it

to write object in Hard disk.

To store the current object to the persistent storage 
location.

serialization is the process of save ing the state of the
object in to file or secondary storage device.The main
purpose serialization we can send the data one layer to
another layer.its converts java  notation object to network
notation object.if we are working with serialization ur
class must implemented serializible interface