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Java Serialization: readObject() vs. readResolve() | Baeldung

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In this tutorial, we’ll look at how to use readObject() and readResolve() methods in the Java deserialization API. Furthermore, we’ll examine the difference between these two methods. Java Serialization covers how serialization and deserialization work in greater depth. In this article, we’ll focus on the readResolve() and readObject() methods, which frequently raise questions when employing deserialization. A Java object is converted into a stream of bytes during serialization to be saved in a file or transferred over the internet. The serialized stream of bytes is transformed back into the original object during deserialization using ObjectInputStream‘s readObject() method, which internally calls defaultReadObject() for default deserialization. If the readObject() method is present in our class, ObjectInputStream‘s readObject() method will use our class’s readObject() method for reading the object from the stream. For instance, in some cases, we can implement readObject() in our clas

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