Exception: java.lang.reflect.UndeclaredThrowableException

Thrown by a method invocation on a proxy instance if its invocation handler's invoke method throws a checked exception (a Throwable that is not assignable to RuntimeException or Error) that is not assignable to any of the exception types declared in the throws clause of the method that was invoked on the proxy instance and dispatched to the invocation handler.

An UndeclaredThrowableException instance contains the undeclared checked exception that was thrown by the invocation handler, and it can be retrieved with the getUndeclaredThrowable() method. UndeclaredThrowableException extends RuntimeException, so it is an unchecked exception that wraps a checked exception.

As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "undeclared checked exception that was thrown by the invocation handler" that may be provided at construction time and accessed via the java.lang.reflect.UndeclaredThrowableException.getUndeclaredThrowable() method is now known as the cause, and may be accessed via the Throwable.getCause() method, as well as the aforementioned "legacy method."

Authors:
@author Peter Jones
See:
@see java.lang.reflect.InvocationHandler
Version:
@version 1.13, 04/02/19
Since:
@since JDK1.3

Inheritance

Superclass tree: Implements:

Methods

  • UndeclaredThrowableExceptiontop

    public UndeclaredThrowableException(Throwable undeclaredThrowable)
    Constructs an UndeclaredThrowableException with the specified Throwable.
    Parameters:
    @param undeclaredThrowable the undeclared checked exception that was thrown
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  • UndeclaredThrowableExceptiontop

    public UndeclaredThrowableException(Throwable undeclaredThrowable, String s)
    Constructs an UndeclaredThrowableException with the specified Throwable and a detail message.
    Parameters:
    @param undeclaredThrowable the undeclared checked exception that was thrown
    @param s the detail message
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  • getCausetop

    public Throwable getCause()
    Returns the cause of this exception (the Throwable instance wrapped in this UndeclaredThrowableException, which may be null).
    Return:
    @return the cause of this exception.
    Since:
    @since 1.4
    Override hierarchy:
    getCause from Throwable
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  • getUndeclaredThrowabletop

    public Throwable getUndeclaredThrowable()
    Returns the Throwable instance wrapped in this UndeclaredThrowableException, which may be null.

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

    Return:
    @return the undeclared checked exception that was thrown
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