Module java.rmi

Package java.rmi.dgc

Class VMID

java.lang.Object

java.rmi.dgc.VMID

All Implemented Interfaces:

Serializable

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

Constructor Summary

Constructors

Constructor	Description
VMID()	Create a new VMID.

Method Summary

Modifier and Type	Method	Description
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()	Deprecated.
String	toString()	Return string representation of this VMID.

Methods declared in class java.lang.Object

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

Constructor Details

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 Details

isUnique

@Deprecated
public static boolean isUnique()

Deprecated.

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

hashCode

public int hashCode()

Compute hash code for this VMID.

Overrides:

hashCode in class Object

Returns:

a hash code value for this object

See Also:

• Object.equals(java.lang.Object)
• System.identityHashCode(java.lang.Object)

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

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:

• Object.hashCode()
• HashMap

toString

public String toString()

Return string representation of this VMID.

Overrides:

toString in class Object

Returns:

a string representation of the object