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2.2 The ObjectOutputStream.PutField Class

Class PutField provides the API for setting values of the serializable fields for a class when the class does not use default serialization. Each method puts the specified named value into the stream. I/O exceptions will be thrown if the underlying stream throws an exception. An IllegalArgumentException is thrown if the name does not match the name of a field declared for this object's ObjectStreamClass or if the type of the value does not match the declared type of the serializable field.