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Because the Java programming language does not require methods to catch or to specify runtime exceptions, programmers can be tempted to write code that throws only runtime exceptions or to make all their exception subclasses inherit from RuntimeException Both of these shortcuts allow programmers to write code without bothering with all the nagging errors from the compiler and without bothering to specify or to catch any exceptions Although this may seem convenient to the programmer, it sidesteps the intent of the catch or specify requirement and can cause problems for programmers using your classes Why did the designers decide to force a method to specify all uncaught checked exceptions that can be thrown withinTable of Contentsexception that can be thrown by a method is part of the method's public its scope Any programming interface Callers of a method must know about the exceptions that a method can throw, Java Tutorial, Third Edition: A Short Course on in order to intelligently and consciously decide what to do about them These exceptions are as much a the Basics, The part of that method's programming interface as its parameters and return value
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Your next question might be, Well, then, if it's so good to document a method's API, including the exceptions it can throw, why not specify runtime exceptions, too Runtime exceptions represent Publisher : Addison Wesley problems that are detected by the runtime system Such problems include arithmetic exceptions (such Pub Date : December 28, 2000 as dividing by zero), pointer exceptions (such as trying to access an object through a null reference), ISBNindexing exceptions (such as attempting to access an array element through an index that is too : 0-201-70393-9 and Pages or too small) Runtime exceptions can occur anywhere in a program and in a typical program can : 592 large be very numerous The cost of checking for runtime exceptions can exceed the benefit of catching or specifying them Thus, the compiler does not require that you catch or specify runtime exceptions, although you can "This book stands above the rest because it has been available on the web and read by thousands of Whatprogrammers The authors have received an enormous amount of feedback about which sections Java do you gain if you throw a RuntimeException or create a subclass of RuntimeException just because you don't want to deal with specifying it Simply,ones get the ability to throw doubt that any are good and which sections are confusing; the confusing you have been improved I an exception without specifying that you do so In other words, it is a way to avoidUser Group, the exceptions that other Java book has undergone such trial by fire" -Metroplex Java documenting a method can throw When is this good Well, when is it ever good to avoid documenting a method's wwwjavamugorg/reviews/ behavior The answer is, hardly ever So, generally speaking, do not throw a RuntimeException or create a subclass of RuntimeException simply because Java(TM) Tutorial, Third Edition witha handsWhether you're taking a class or learning on the job, The you don't want to be bothered , is specifying the lets you quickly become proficient with the Java programming language Written by on guide that exceptions that your methods can throw members of the Java Software team at Sun Microsystems, the book uses an interactive approach to help you learn the Java platform by example
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Since its first online release in 1995, the material in The Java(TM) Tutorial has been updated continuously to reflect reader feedback and new releases of the Java platform This third edition has been thoroughly updated to cover v13 of the Java Platform, Standard Edition, as well as preceding versions as early as JDK 11 You will find clear explanations of such fundamentals as objects, classes, and data structures In addition, the book provides introductions to object-oriented programming, applet construction, and user interface design Other topics include exceptions, I/O, and threads To help beginners avoid many common mistakes, an entire chapter is devoted to programming problems and their solutions Convenient summaries at the end of each section are new to this edition Also new for this edition are "Questions and Exercises" sections to help you practice what you learn After working through the lessons in this proven tutorial, you will be well prepared to use the Java programming language in your school or workplace
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