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	Exception handling - Wikipedia, the free encyclopedia
		Exception handling is a programming language construct or computer hardware mechanism designed to handle the occurrence of some condition that changes the normal flow of execution.
		Exception handling is intended to facilitate use of reasonable mechanisms for handling erroneous or exceptional situations that arise in programs.
		This is related to the so-called resumption model of exception handling, in which some exceptions are said to be continuable: it is permitted to return to the expression that signaled an exception, after having taken corrective action in the handler.
	en.wikipedia.org /wiki/Exception_handling (1834 words)

	Error and Exception Handling in C# and .NET (Site not responding. Last check: 2007-10-07)
		Exception management is one of the key area for all kinds of application development.You should adopt an appropriate strategy for exception management to build high quality and robust application.It is a very powerful concept and makes the development work very easy if its used efficiently.
		An object of an exception is that describe the exceptional conditions occur in a code That means, we are catching an exception, creating an object of it, and then throwing it.
		Exception handling is an in built mechanism in.NET framework to detect and handle run time errors.
	www.c-sharpcorner.com /ExceptionHandling.asp (593 words)

	perl.com: Object Oriented Exception Handling in Perl
		An exception can be defined as an event that occurs during the execution of a program that deviates it from the normal execution path.
		Exceptions come to the rescue by allowing contextual information to be captured at the point where the error occurs and propagate it to a point where it can be effectively used/handled.
		With OO exception handling, all you need to do is wrap the function call to func2() within the try block and handle the exceptions thrown from that block with an appropriate exception handler (catch block).
	www.perl.com /pub/a/2002/11/14/exception.html (1510 words)

	Neil Fraser: Writing: Exception Handling
		An exception handler which was added to deal with a particular event (say, a divide by zero), sometimes ends up suppressing all similar events within a large area.
		Exception handling is often used as the lazy way out of a problem.
		The problem with relying on exception handlers is that code is being stressed in ways that it may not have been designed for.
	neil.fraser.name /writing/exception (1291 words)

	Exception Handling Frameworks
		Exception handling is the mechanism by which objects raise and trap errors.
		Before raising the exception, you add the exception file offset to the exception number to get a unique exception ID. The object raising the exception may not be the object which registered the error message file, so it can query the ExceptionManager to get the offset for its associated error file.
		The exception can then either be trapped by an exception handler that knows what to do with it, or by the system exception handler, which terminates your application.
	www.emunix.emich.edu /info/cobol/books/opfwex.htm (1766 words)

	GameDev.net - Understanding C++ Exception Handling (Site not responding. Last check: 2007-10-07)
		C++ Exception Handling is centered around the three keywords: try, catch, and throw, the general purpose of which is to attempt to execute code and handle unexpected exceptional conditions, hence the name.
		I've also generally taken the approach that exceptions should get propagated up to the thread routine and should cause the thread to exit, in a normal fashion, which would then allow the managing thread to notice one thread it is dependent upon is not running and shut down all relevant threads.
		Exceptions can greatly simplify the development of a C++ package and provide the component writer a way to enforce the assumptions made when the component was implemented.
	www.gamedev.net /reference/articles/article953.asp (4296 words)

	Zend Technologies - PHP 5 Core Basics - Exceptional Code
		This delegates error handling to calling code, which is usually better equipped to decide how to react than the method or function in which the error occurred.
		Exception handling so far has not been so different from code that checks return values for error flags or objects.
		That is, exceptions are passed back to the code that is best placed to decide how to handle an error.
	www.zend.com /php5/articles/php5-exceptions.php (2689 words)

	ONJava.com -- Best Practices for Exception Handling
		A checked exception thrown by a lower layer is a forced contract on the invoking layer to catch or throw it.
		The checked exception contract between the API and its client soon changes into an unwanted burden if the client code is unable to deal with the exception effectively.
		Thus, the exception handling forces an inappropriately tight coupling between the method and its callers.
	www.onjava.com /pub/a/onjava/2003/11/19/exceptions.html (1197 words)

	Exception Handling
		The word "exception" is meant to be more general than "error." It includes any circumstance that arises as the program is executed which is meant to be treated as an exception to the normal flow of control of the program.
		An exception might be an error, or it might just be a special case that can be more elegantly handled by catching the exception than by checking for the possibility beforehand.
		Exceptions that require mandatory handling generally represent conditions that are outside the control of the programmer.
	www.kinabaloo.com /basics8.html (2384 words)

	Exception Handling (Site not responding. Last check: 2007-10-07)
		The scope of an exception handler is from the point of definition to the end of the file, the definition of a new exception handler, or until the handler is deleted.
		Handling C++ exceptions is almost completely trivial (well, all except for the actual C++ part).
		Creating one universal exception handler for all functions may be unwieldy and promote excessive code bloat since the handler will be inlined into each wrapper function created.
	www.swig.org /Doc1.1/HTML/Exceptions.html (1085 words)

	Best practices in EJB exception handling
		In fact, application exceptions are guaranteed to be delivered to the client as is: the EJB container does not wrap or massage the exception in any way.
		In this type of scenario, the content of the exception is said to have been "swallowed." As this example shows, throwing or rethrowing an exception with a message is not a good exception-handling solution.
		This type of exception need not be logged in the EJB tier or the client tier; rather, it should be presented to the end user in a meaningful way, with an alternate path to resolution provided.
	www-106.ibm.com /developerworks/java/library/j-ejbexcept.html (5180 words)

	Chapter 6. Exceptions and File Handling
		When the exception was raised, there was no code to explicitly notice it and deal with it, so it bubbled its way back to the default behavior built in to Python, which is to spit out some debugging information and give up.
		Sometimes an exception is really because you have a bug in your code (like accessing a variable that doesn't exist), but many times, an exception is something you can anticipate.
		Exceptions may seem unfriendly (after all, if you don't catch the exception, your entire program will crash), but consider the alternative.
	diveintopython.org /file_handling (1015 words)

	Programming Exception Handling
		To issue exceptions the code cannot intercept on its own (such as data in the wrong format), first create an instance of java.lang.Throwable, then declare the signature of a method with a throws clause and throw objects.
		The Throwable class is the superclass of all errors and exceptions in the Java language.
		Some of these classes are not checked to see if they are included in a method's Throws List of exceptions (they do not have to be declared), while some other classes are checked.
	www.wilsonmar.com /1pgmexcp.htm (470 words)

	ChurchillObjects.com - Exception Handling in Java (Site not responding. Last check: 2007-10-07)
		The error handling doesn’t even have to be in the same method as the code that might cause problems.
		By removing error checking code from one class, you turn the decision of how to handle the exception over to the calling methods, which may be located in outside classes or even subclasses.
		Java exceptions can even be created from scratch and have their own handling logic embedded into them.
	www.churchillobjects.com /c/11012.html (498 words)

	Exception Handling
		The idea of exception handling (often called "Structured Exception Handling") is that your application instals one or more callback routines called "exception handlers" at run-time and then, if an exception occurs, the system will call the routine to let the application deal with the exception.
		The hope would be that the exception handler may be able to repair the exception and continue running either from the same area of code where the exception occurred, or from a "safe place" in the code as if nothing had happened.
		If the exception has occurred during the call by the system to a window procedure, then often a good safe-place will be near the exit point of the window procedure so that control passes back to the system cleanly.
	www.delikon.de /texts/Exceptionhandling.html (6826 words)

	Error and Exception Handling (Site not responding. Last check: 2007-10-07)
		An oft-cited guideline is to ask yourself the question ``is this an exceptional (or unexpected) situation?'' This guideline has an attractive ring to it, but is usually a mistake.
		The problem is that one person's ``exceptional'' is another's ``expected'': when you really look at the terms carefully, the distinction evaporates and you're left with no guideline.
		On the other hand, it would probably be inappropriate to throw and handle exceptions in the inner loop of this computation because that could have a significant performance impact.
	www.boost.org /more/error_handling.html (1204 words)

	Exception Handling - MYCPLUS
		Exceptions are the way of flagging unexpected conditions or errors that have occured in C++ program.
		An exception may be a class object type such as DateException, or a fundamental C++ type like an integer.
		C++ exceptions are not the same as low-level hardware interrupts, nor are they the same as UNIX signals such as SIGTERM.
	www.mycplus.com /cplus.asp?CID=40 (598 words)

	Dr. Dobb's \| Revisiting Exception Handling \| May 13, 2003 (Site not responding. Last check: 2007-10-07)
		One of the reasons that I wholeheartedly supported exceptions being in C++ from the beginning is that I have continually seen the problems of trying to build a consistent and reliable error-handling strategy without exceptions.
		Before exceptions in C++, the defacto standard method of signaling an error was as a function return.
		What I recommended at the time was that libraries should use exceptions to report errors as their default, but they should also provide alternatives that would avoid the exceptions for those cases and those clients that needed to handle the conditions as part of normal control flow.
	www.ddj.com /dept/cpp/184403863 (3756 words)

	Exception-Handling Statements (Site not responding. Last check: 2007-10-07)
		The exception handler can attempt to recover from the error or, if it determines that the error is unrecoverable, provide a gentle exit from the program.
		This is a brief overview of the statements used in reporting and handling errors.
		However, other factors and considerations — such as the difference between runtime and checked exceptions and the hierarchy of exceptions classes, which represent various types of exceptions — play a role in using the exception mechanism.
	java.sun.com /docs/books/tutorial/java/nutsandbolts/exception.html (241 words)

	C++ Exception Handling
		Secondly, it stimulates consequences because errors are being handled in one place and in one manner.
		Before a system of exception handling was introduced, computer programs were certainly not error-free.
		In this example, Exception is a defined class with a constructor with no parameters (as identified by the throw-call).
	www.eastcoastgames.com /articles/cppexception.html (748 words)

	Advance Exception handling - MYCPLUS
		Other applications provide error handling that only a developer could love—the messages are replete with jargon and the data is useful only if you designed the application.
		If the caller doesn’t “catch” the error and handle it, it goes to the next enclosing dynamic scope, and so on until the error is either caught or the program terminates because there was no handler to catch that type of exception.
		This article examines C’s approach to error handling (such as it is), discusses why it did not work well for C, and explains why it won’t work at all for C++.
	www.mycplus.com /cplus.asp?CID=48 (401 words)

	SRFI 12: Exception Handling
		This SRFI requires a Scheme implementation to raise an exception whenever an error is to be signaled or whenever the system determines that evaluation cannot proceed in a manner consistent with the semantics of Scheme.
		When the current exception handler is invoked for a continuable exception, the continuation uses the handler's result(s) in an exception-specific way to continue.
		When an exception handler is invoked for a non-continuable exception, the continuation raises a non-continuable exception indicating that the exception handler returned.
	srfi.schemers.org /srfi-12/srfi-12.html (1335 words)

	PHP5 Exception Handling (Site not responding. Last check: 2007-10-07)
		Exceptions are used to handle (unforseen) Error Conditions within your Application and offer a comfortable way of Error Handling.
		Languages like Java implement Exceptions in a rather strict way (checked Exceptions, Propagation), whereas in PHP5, Exceptions are used as an addon which you can use, but don't have to.
		While standard Error Handling must be performed, no matter if you use Exceptions or not, there's only one big difference between them: they're used for different things.
	www.andreashalter.ch /phpug/20040115 (243 words)

	Exception Handling (Site not responding. Last check: 2007-10-07)
		Traditional error handling methods such as errno are problematic in large-scale applications because they don't guarantee that runtime errors are actually caught and handled.
		C++ introduced exception handling in 1989 to solve the shortcomings of traditional error handling methods.
		Use exceptions to pass information about anomalous runtime conditions and to transfer control to an appropriate handler.
	gethelp.devx.com /techtips/cpp_pro/10min/2002/June/10min0602.asp (234 words)

	Internet Explorer 5.0 Review, Part IV: Exception Handling - www.docjavascript.com
		Exception handling is a key feature of modern programming languages such as C++, Java, and VBScript.
		Exception handling is based on a syntax that allows the programmer to differentiate between normal-processing code and error-processing code.
		Separating exception handling code from the other lines makes the code much easier to read, maintain, and modify.
	www.webreference.com /js/column38 (342 words)

	Exception Handling (Site not responding. Last check: 2007-10-07)
		We use the term exceptions to define errors in program execution that are handled by a non-local change in execution state.
		These predicates are ISO-compatable, and their use can give a great deal of control to exception handling.
		The ancestor's handler (third argument) is called and the exception is thereby handled.
	xsb.sourceforge.net /manual1/node128.html (566 words)

	Handling Errors Using Exceptions
		An exception is an event that occurs during the execution of a program that disrupts the normal flow of instructions.
		Since the Java programming language does not require methods to catch or to specify runtime exceptions or errors, programmers can be tempted to write code that only throws runtime exceptions.
		The use of exceptions to manage errors has some advantages over traditional error-management techniques.
	java.sun.com /docs/books/tutorial/essential/exceptions (192 words)

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