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4.2 Dynamic Proxy Class Descriptors

ObjectStreamClass descriptors are also used to provide information about dynamic proxy classes (e.g., classes obtained via calls to the getProxyClass method of java.lang.reflect.Proxy) saved in a serialization stream. A dynamic proxy class itself has no serializable fields and a serialVersionUID of 0L. In other words, when the Class object for a dynamic proxy class is passed to the static lookup method of ObjectStreamClass, the returned ObjectStreamClass instance will have the following properties:

• Invoking its getSerialVersionUID method will return 0L.
• Invoking its getFields method will return an array of length zero.
• Invoking its getField method with any String argument will return null.