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

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Class java.rmi.dgc.VMID

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

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.

VMID(): Create a new VMID.

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

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.

The static method isUnique can be invoked to determine if an accurate address can be obtained for this host.

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

hashCode

 public int hashCode()

Compute hash code for this VMID.

Overrides:: hashCode in class 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

toString

 public String toString()

Return string representation of this VMID.

Overrides:: toString in class Object

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