Basic HTML version of Foils prepared Sept 6 1998

Foil 50 Classes of Exceptions

From Java Tutorial 98-2: Java Language and Object Oriented Techniques CPS606 Fall Semester 1999 -- Sept 7 1999. by Geoffrey C. Fox, Nancy McCracken
There are two subclasses of Throwable
  • Error such as OutOfMemoryError which do NOT have to be caught as they are serious but unpredictable and could typically occur anywhere!
  • Exception which we have discussed
Exception has a subclass RuntimeException that need NOT be caught
  • Typical RuntimeException subclasses are
    • ArithmeticException, ClassCastException, IndexOutofBoundException
Note that exceptions which are thrown but not caught appear as error message on stderr. For applets this is in the "Java console" of the browser.

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