# Class NTSidDomainPrincipal

java.lang.Object
com.sun.security.auth.NTSid
com.sun.security.auth.NTSidDomainPrincipal

All Implemented Interfaces:
  `Serializable, Principal`

public class NTSidDomainPrincipal extends NTSid
This class extends `NTSid` and represents a Windows NT user's domain SID.

An NT user only has a domain SID if in fact they are logged into an NT domain. If the user is logged into a workgroup or just a standalone configuration, they will NOT have a domain SID.

Principals such as this `NTSidDomainPrincipal` may be associated with a particular `Subject` to augment that `Subject` with an additional identity. Refer to the `Subject` class for more information on how to achieve this. Authorization decisions can then be based upon the Principals associated with a `Subject`.

Since:
  1.4
See Also:
  - `Principal`
  - `Subject`
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `NTSidDomainPrincipal(String name)`
  Create an `NTSidDomainPrincipal` with a Windows NT SID.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `equals(Object o)`
  Compares the specified Object with this `NTSidDomainPrincipal` for equality.
  `String`
  `toString()`
  Return a string representation of this `NTSidDomainPrincipal`.

  ### Methods declared in class NTSid

  `getName, hashCode`

  ### Methods declared in class Object

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

  ### Methods declared in interface Principal

  `implies`

- ## Constructor Details

  - ### NTSidDomainPrincipal

    public NTSidDomainPrincipal(String name)
    Create an `NTSidDomainPrincipal` with a Windows NT SID.
    Parameters:
      `name` - a string version of the Windows NT SID for this user's domain.
    Throws:
      `NullPointerException` - if the `name` is `null`.

- ## Method Details

  - ### toString

    public String toString()
    Return a string representation of this `NTSidDomainPrincipal`.
    Specified by:
      `toString` in interface `Principal`
    Overrides:
      `toString` in class `NTSid`
    Returns:
      a string representation of this `NTSidDomainPrincipal`.

  - ### equals

    public boolean equals(Object o)
    Compares the specified Object with this `NTSidDomainPrincipal` for equality. Returns true if the given object is also a `NTSidDomainPrincipal` and the two NTSidDomainPrincipals have the same SID.
    Specified by:
      `equals` in interface `Principal`
    Overrides:
      `equals` in class `NTSid`
    Parameters:
      `o` - Object to be compared for equality with this `NTSidDomainPrincipal`.
    Returns:
      true if the specified Object is equal to this `NTSidDomainPrincipal`.
    See Also:
      - `Object.hashCode()`
      - `HashMap`