PPT Slide

• Results in an error saying that dequeue must catch or declare QueueEmptyException. 

• To resolve this, modify dequeue so that the exception is declared to be thrown:

public void dequeue(Object o) throws QueueEmptyException {

if (isEmpty( ) == true)

throw new QueueEmptyException( );

...

}

• The method header above declares that this

method can throw a  QueueEmptyException

and that the method calling dequeue( ) must plan

on catching the QueueEmptyException.

Exceptions: Propagation

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