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exp refers to an object of class Exception (or a subclass).

Exception Objects

  // statements, some of which might throw an exception

catch ( SomeExceptionType exp )      // may be omitted if there is a finally block
  // statements to handle 
  // SomeExceptionType exceptions

// additional catch blocks (optional)

// finally block  (optional, unless there are no catch blocks)

When a catch{} block receives control it has a reference to an object of class Exception (or a subclass of Exception). The class of the object depends on what exception was thrown.

When an exception event occurs while a program is running, the Java run time system takes over and creates an Exception object to represent the event. Information about the event is put in the object.

If the exception arose inside a try{} block, the Java run time system sends the Exception object to the appropriate catch{} block (if there is one).

The parameter of the catch{} block (exp in the above) refers to the Exception object.


Does an Exception object contain methods, like ordinary objects?