Class java.rmi.server.ObjID - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.rmi.server.ObjID

java.lang.Object
   |
   +----java.rmi.server.ObjID

public final class ObjID
extends Object
implements Serializable

The class ObjID is used to identify remote objects uniquely in a VM over time. Each identifier contains an object number and an address space identifier that is unique with respect to a specific host. An object identifier is assigned to a remote object when it is exported.

DGC_ID: well-known id for the distributed garbage collector
REGISTRY_ID: well-known id for the registry

ObjID(): Generate unique object identifier.
ObjID(int): Generate a "well-known" object ID.

equals(Object): Two object identifiers are considered equal if they have the same contents.
hashCode(): The hashcode is the object number.
read(ObjectInput): The read method constructs an object id whose contents is read from the specified input stream.
toString(): Returns a string containing the object id representation.
write(ObjectOutput): Marshal object id to output stream.

REGISTRY_ID

 public static final int REGISTRY_ID

well-known id for the registry

DGC_ID

 public static final int DGC_ID

well-known id for the distributed garbage collector

ObjID

 public ObjID()

Generate unique object identifier.

ObjID

 public ObjID(int num)

Generate a "well-known" object ID. An object ID generated via this constructor will not clash with any object IDs generated via the default constructor.

Parameters:: num - a unique well-known object number

write

 public void write(ObjectOutput out) throws IOException

Marshal object id to output stream.

read

 public static ObjID read(ObjectInput in) throws IOException

The read method constructs an object id whose contents is read from the specified input stream.

hashCode

 public int hashCode()

The hashcode is the object number.

Overrides:: hashCode in class Object

equals

 public boolean equals(Object obj)

Two object identifiers are considered equal if they have the same contents.

Overrides:: equals in class Object

toString

 public String toString()

Returns a string containing the object id representation. The address space identifier is included in the string representation only if the object id is from a non-local address space.

Overrides:: toString in class Object

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