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Overview of Object Serialization
An Introduction to Socket Programming
(Continued from previous question...)
Overview of Object Serialization
Overview of Object Serialization
Object serialization is a mechanism that is useful in any program
that wants to save the state of objects to a file and later read
those objects to reconstruct the state of the program, or to send
an object over the network using sockets. Serializing a class can
be easily done simply by having the class implement the
java.io.Serializable interface. This interface is a
marker interface. In other words, it does not have any methods
that need to be implemented by the class implementing it. It is
mainly used to inform the Java virtual machine (JVM) that you want
the object to be serialized.
There are two main classes that are used for reading and writing
objects to streams: ObjectOutputStream and ObjectInputStream.
The ObjectOutputStream provides the writeObject
method for writing an object to an output stream, and the
ObjectInputStream provides the readObject
method for reading the object from an input stream. It is important
to note that the objects used with these methods must be serialized.
That is, their classes must implement the Serializable
interface.
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