Class RemoteObject

java.lang.Object
- java.rmi.server.RemoteObject

All Implemented Interfaces:: Serializable, Remote

Direct Known Subclasses:: RemoteObjectInvocationHandler, RemoteServer, RemoteStub

public abstract class RemoteObject
extends Object
implements Remote, Serializable

The RemoteObject class implements the java.lang.Object behavior for remote objects. RemoteObject provides the remote semantics of Object by implementing methods for hashCode, equals, and toString.

Since:: 1.1
See Also:: Serialized Form

Fields

Modifier and Type	Field	Description
`protected RemoteRef`	`ref`	The object's remote reference.

Constructors

Modifier	Constructor	Description
`protected`	`RemoteObject()`	Creates a remote object.
`protected`	`RemoteObject(RemoteRef newref)`	Creates a remote object, initialized with the specified remote reference.

Methods

Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`	Compares two remote objects for equality.
`RemoteRef`	`getRef()`	Returns the remote reference for the remote object.
`int`	`hashCode()`	Returns a hashcode for a remote object.
`String`	`toString()`	Returns a String that represents the value of this remote object.
`static Remote`	`toStub(Remote obj)`	Returns the stub for the remote object `obj` passed as a parameter.

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Fields

ref

protected transient RemoteRef ref

The object's remote reference.

Constructors

RemoteObject

protected RemoteObject()

Creates a remote object.

RemoteObject

protected RemoteObject(RemoteRef newref)

Creates a remote object, initialized with the specified remote reference.

Parameters:: newref - remote reference

Methods

getRef

public RemoteRef getRef()

Returns the remote reference for the remote object.

Note: The object returned from this method may be an instance of an implementation-specific class. The RemoteObject class ensures serialization portability of its instances' remote references through the behavior of its custom writeObject and readObject methods. An instance of RemoteRef should not be serialized outside of its RemoteObject wrapper instance or the result may be unportable.

Returns:: remote reference for the remote object
Since:: 1.2

toStub

public static Remote toStub(Remote obj)
                     throws NoSuchObjectException

Returns the stub for the remote object obj passed as a parameter. This operation is only valid after the object has been exported.

Parameters:: obj - the remote object whose stub is needed
Returns:: the stub for the remote object, obj.
Throws:: NoSuchObjectException - if the stub for the remote object could not be found.
Since:: 1.2

hashCode

public int hashCode()

Returns a hashcode for a remote object. Two remote object stubs that refer to the same remote object will have the same hash code (in order to support remote objects as keys in hash tables).

Overrides:: hashCode in class Object
Returns:: a hash code value for this object.
See Also:: Hashtable

equals

public boolean equals(Object obj)

Compares two remote objects for equality. Returns a boolean that indicates whether this remote object is equivalent to the specified Object. This method is used when a remote object is stored in a hashtable. If the specified Object is not itself an instance of RemoteObject, then this method delegates by returning the result of invoking the equals method of its parameter with this remote object as the argument.

Overrides:: equals in class Object
Parameters:: obj - the Object to compare with
Returns:: true if these Objects are equal; false otherwise.
See Also:: Hashtable

toString

public String toString()

Returns a String that represents the value of this remote object.

Overrides:: toString in class Object
Returns:: a string representation of the object.

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/11/docs/api/java.rmi/java/rmi/server/RemoteObject.html