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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class VMID - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.rmi.dgc
Class VMID

java.lang.Object
  |
  +--java.rmi.dgc.VMID

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public final class VMID

extends Object

implements Serializable

A VMID is a identifier that is unique across all Java virtual machines. VMIDs are used by the distributed garbage collector to identify client VMs.

See Also:

Serialized Form

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Constructor Summary

VMID()           Create a new VMID.

 

Method Summary
boolean	equals(Object obj)           Compare this VMID to another, and return true if they are the same identifier.
int	hashCode()           Compute hash code for this VMID.
static boolean	isUnique()           Return true if an accurate address can be determined for this host.
String	toString()           Return string representation of this VMID.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

VMID

public VMID()

Create a new VMID. Each new VMID returned from this constructor is unique for all Java virtual machines under the following conditions: a) the conditions for uniqueness for objects of the class java.rmi.server.UID are satisfied, and b) an address can be obtained for this host that is unique and constant for the lifetime of this object.

Method Detail

isUnique

public static boolean isUnique()

Return true if an accurate address can be determined for this host. If false, reliable VMID cannot be generated from this host

Returns:

true if host address can be determined, false otherwise

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hashCode

public int hashCode()

Compute hash code for this VMID.

Overrides:

hashCode in class Object

Tags copied from class: Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable

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equals

public boolean equals(Object obj)

Compare this VMID to another, and return true if they are the same identifier.

Overrides:

equals in class Object

Tags copied from class: Object

Parameters:

obj - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

See Also:

Boolean.hashCode(), Hashtable

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toString

public String toString()

Return string representation of this VMID.

Overrides:

toString in class Object

Tags copied from class: Object

Returns:

a string representation of the object.

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