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.