Object Replacement with the existing one int the Serialization Stream..

when u readObject() from serialization its fine,but if u change any of its fields or value of variable and than store it back,it append new object to the Serialization Stream.
I want to store that object back to its original position in the stream.
please help me in this regard..

you need to use (override) the readResolve() and writeReplace() methods in the classes that you'll be switching their instances/values/etc. with something else.
Look at the javadocs for the java.io.Serializable interface.
Another option is to subclass the ObjectInputStream and override the resolveObject method. (see java.io.ObjectInputStream). You'll probably also have to subclass ObjectOutputStream and override the writeObjectOverride method.
You really only need to use one of these mechanisms, not both.
- Andrew

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