MarshalledObject (Java Platform SE 8 )
Keywords: java.rmi.MarshalledObject class
Date: 2026-04-17

compact2, compact3
java.rmi

## Class MarshalledObject<T>

- java.lang.Object
- - java.rmi.MarshalledObject<T>

- Type Parameters:
    `T` - the type of the object contained in this `MarshalledObject`
  All Implemented Interfaces:
    Serializable

      public final class MarshalledObject<T>
      extends Object
      implements Serializable

  A `MarshalledObject` contains a byte stream with the serialized representation of an object given to its constructor. The `get` method returns a new copy of the original object, as deserialized from the contained byte stream. The contained object is serialized and deserialized with the same serialization semantics used for marshaling and unmarshaling parameters and return values of RMI calls: When the serialized form is created:
  - classes are annotated with a codebase URL from where the class can be loaded (if available), and
  - any remote object in the `MarshalledObject` is represented by a serialized instance of its stub.

  When copy of the object is retrieved (via the `get` method), if the class is not available locally, it will be loaded from the appropriate location (specified the URL annotated with the class descriptor when the class was serialized.

  `MarshalledObject` facilitates passing objects in RMI calls that are not automatically deserialized immediately by the remote peer.

  Since:
    1.2
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `MarshalledObject(T obj)` Creates a new `MarshalledObject` that contains the serialized representation of the current state of the supplied object.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object obj)` Compares this `MarshalledObject` to another object.
    `T` | `get()` Returns a new copy of the contained marshalledobject.
    `int` | `hashCode()` Return a hash code for this `MarshalledObject`.

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### MarshalledObject

          public MarshalledObject(T obj)
                           throws IOException

      Creates a new `MarshalledObject` that contains the serialized representation of the current state of the supplied object. The object is serialized with the semantics used for marshaling parameters for RMI calls.
      Parameters:
        `obj` - the object to be serialized (must be serializable)
      Throws:
        `IOException` - if an `IOException` occurs; an `IOException` may occur if `obj` is not serializable.
      Since:
        1.2

  - ### Method Detail

    - #### get

          public T get()
                throws IOException,
                       ClassNotFoundException

      Returns a new copy of the contained marshalledobject. The internal representation is deserialized with the semantics used for unmarshaling parameters for RMI calls.
      Returns:
        a copy of the contained object
      Throws:
        `IOException` - if an `IOException` occurs while deserializing the object from its internal representation.
        `ClassNotFoundException` - if a `ClassNotFoundException` occurs while deserializing the object from its internal representation. could not be found
      Since:
        1.2

    - #### hashCode

          public int hashCode()

      Return a hash code for this `MarshalledObject`.
      Overrides:
        `hashCode` in class `Object`
      Returns:
        a hash code
      See Also:
        `Object.equals(java.lang.Object)`, `System.identityHashCode(java.lang.Object)`

    - #### equals

          public boolean equals(Object obj)

      Compares this `MarshalledObject` to another object. Returns true if and only if the argument refers to a `MarshalledObject` that contains exactly the same serialized representation of an object as this one does. The comparison ignores any class codebase annotation, meaning that two objects are equivalent if they have the same serialized representation except for the codebase of each class in the serialized representation.
      Overrides:
        `equals` in class `Object`
      Parameters:
        `obj` - the object to compare with this `MarshalledObject`
      Returns:
        `true` if the argument contains an equivalent serialized object; `false` otherwise
      Since:
        1.2
      See Also:
        `Object.hashCode()`, `HashMap`

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