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Exception handling
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Hinweis der Redaktion
- The first kind of exception is the checked exception . These are exceptional conditions that a well-written application should anticipate and recover from. The second kind of exception is the error . These are exceptional conditions that are external to the application, and that the application usually cannot anticipate or recover from. Errors are not subject to the Catch or Specify Requirement. Errors are those exceptions indicated by Error and its subclasses The third kind of exception is the runtime exception . These are exceptional conditions that are internal to the application, and that the application usually cannot anticipate or recover from. These usually indicate programming bugs, such as logic errors or improper use of an API.
- If you feel that a method doesn't know how to handle a particular error, you can throw an exception from the method and let someone else deal with it. If you throw a "checked" exception, you enlist the help of the Java compiler to force client programmers to deal with the potential exception, either by catching it or declaring it in the throws clause of their methods.