In contrast to some other languages, Java's simplicity and consistency allow compilers to detect many more errors. Java developers learn to rely on their compilers to catch assignments to incorrect types, calls of nonexistent methods and—this article's topic—incorrect exception handling. But situations still crop up where you really need to know what you're doing. If you understand exactly how Java allows you to throw and catch exceptions, you'll know when you need to be extra careful and what practices can keep you out of trouble.
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Obtenir des messages d'erreurs appropriés à son programme, cela passe parfois par la création de ses propres exceptions. Voyons comment procéder.

Obtenir des messages d'erreurs appropriés à son programme, cela passe parfois par la création de ses propres exceptions. Voyons comment procéder.

Logging your programs can greatly aid in debugging them, but writing frequent log statements in your code can be painful. Log statements are prone to errors, and those that are misused or overlooked sometimes require debugging themselves. This article introduces Jylog, a new approach to error-free and flexible event logging. Based on the Java Platform Debugger Architecture (JPDA), Jylog completely separates logging from coding. Learn how Jylog and its underlying technology, JPDA, work, and how you can use them to build a logger or debugger. Also discover how Jylog can help you in other application areas, such as unit testing and reverse engineering. (3,400 words)