Using interrupt()

	Chapter 12 - Exception Callback
	Java Thread Programming
	Paul Hyde

Copyright 1999 Sams Publishing

---

ExceptionListener Interface

Classes that want to be notified when an exception occurs in an active class can implement the ExceptionListener interface shown in Listing 12.1.

Listing 12.1  ExceptionListener.javaThe Interface to Be Implemented for Exception Callback

1: public interface ExceptionListener {

2:     public void exceptionOccurred(Exception x, Object source);

3: }

This interface declares that classes of the type ExceptionListener must implement an exceptionOccurred() method. An active class will invoke this method on the listener whenever a notable exception should be relayed. The first parameter, x , is a reference to the actual exception. The second parameter, source , is a reference to the active class that caught the exception. Having a reference to the source object allows one ExceptionListener to monitor more than one active object and take a different course of action for each object monitored . If this is not necessary, the source parameter can simply be ignored.

Toc