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/OpenJDK 25

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:

Constructor Summary

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 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:

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:

toString

public String toString()
Return string representation of this VMID.
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.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/25/docs/api/java.rmi/java/rmi/dgc/VMID.html