Version 4 (modified by welberge, 8 years ago) (diff)


^ElckerlycDocumentation? [PageOutline?]

Exception handling guidelines

  1. Use checked exceptions for exceptions that the client can take useful actions upon. Use RunTimeException and its subclasses otherwise.
  2. Store information in the exceptions so that the client can use this information in recovering from them (for example: the AudioUnitPlayException contains the failing AudioUnit).
  3. A chain of exceptions can be used to translate a low-level exception into a higher level one. When this technique is used, always include the original exception in the higher level exception (using initCause), so that it stack trace can be used in debugging.
  4. Don't ignore exceptions. Either catch them and act upon them or throw them. If an exception can't happen, but has to be caught anyways, throw an AssertionError. If the occurrence of an exception doesn't influence the progress of the client (for example, a file not properly closing after reading all information from it), at least log it.