VMID (Java SE 15 & JDK 15) (original) (raw)

All Implemented Interfaces:

[Serializable](../../../../java.base/java/io/Serializable.html "interface in java.io")

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

• Method Summary

• 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.
  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](../../../../java.base/java/lang/Object.html#hashCode%28%29) in class [Object](../../../../java.base/java/lang/Object.html "class in java.lang")
  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](../../../../java.base/java/lang/Object.html#equals%28java.lang.Object%29) in class [Object](../../../../java.base/java/lang/Object.html "class in java.lang")
  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

  Return string representation of this VMID.
  Overrides:
  [toString](../../../../java.base/java/lang/Object.html#toString%28%29) in class [Object](../../../../java.base/java/lang/Object.html "class in java.lang")
  Returns:
  a string representation of the object.