PrivilegedActionException (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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java.security
Class PrivilegedActionException

java.lang.Object
  |
  +--java.lang.Throwable
        |
        +--java.lang.Exception
              |
              +--java.security.PrivilegedActionException

All Implemented Interfaces:: Serializable

public class PrivilegedActionException
extends Exception

This exception is thrown by doPrivileged(PrivilegedExceptionAction) and doPrivileged(PrivilegedExceptionAction, AccessControlContext context) to indicate that the action being performed threw a checked exception. The exception thrown by the action can be obtained by calling the getException method. In effect, an PrivilegedActionException is a "wrapper" for an exception thrown by a privileged action.

As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "exception thrown by the privileged computation" that is provided at construction time and accessed via the getException() method is now known as the cause, and may be accessed via the Throwable.getCause() method, as well as the aforementioned "legacy method."

See Also:: PrivilegedExceptionAction, AccessController.doPrivileged(PrivilegedExceptionAction), AccessController.doPrivileged(PrivilegedExceptionAction,AccessControlContext), Serialized Form

Constructor Summary

PrivilegedActionException(Exception exception)
          Constructs a new PrivilegedActionException "wrapping" the specific Exception.

Method Summary

Throwable getCause()
          Returns the the cause of this exception (the exception thrown by the privileged computation that resulted in this PrivilegedActionException).

Exception getException()
          Returns the exception thrown by the privileged computation that resulted in this PrivilegedActionException.

String toString()
          Returns a short description of this throwable.

Methods inherited from class java.lang.Throwable

fillInStackTrace, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PrivilegedActionException

public PrivilegedActionException(Exception exception)

Constructs a new PrivilegedActionException "wrapping" the specific Exception.
Parameters:: exception - The exception thrown

Method Detail

getException

public Exception getException()

Returns the exception thrown by the privileged computation that resulted in this PrivilegedActionException.

This method predates the general-purpose exception chaining facility. The Throwable.getCause() method is now the preferred means of obtaining this information.

Returns:: the exception thrown by the privileged computation that resulted in this PrivilegedActionException.
See Also:: PrivilegedExceptionAction, AccessController.doPrivileged(PrivilegedExceptionAction), AccessController.doPrivileged(PrivilegedExceptionAction, AccessControlContext)

getCause

public Throwable getCause()

Returns the the cause of this exception (the exception thrown by the privileged computation that resulted in this PrivilegedActionException).

Overrides:: getCause in class Throwable

Returns:: the cause of this exception.
Since:: 1.4

toString

public String toString()

Description copied from class: Throwable

Returns a short description of this throwable. If this Throwable object was created with a non-null detail message string, then the result is the concatenation of three strings:

The name of the actual class of this object
": " (a colon and a space)
The result of the Throwable.getMessage() method for this object

If this Throwable object was created with a null detail message string, then the name of the actual class of this object is returned.

Overrides:: toString in class Throwable

Returns:: a string representation of this throwable.