PPT Slide

• In Java, there are actually two types of Exceptions:
  • those subclassed from Exception
  • those subclassed from RuntimeException

A technoid annoyance: Both kinds deal with run-time errors

• Those subclassed from RuntimeException do not have to be  explicitly caught or declared in the method header.

• This is good. It prevents code from being cluttered with exception handling:

// possible ArrayIndexOutOfBounds

customerArray[10] = new Customer( );

// possible ArithmeticException

x = y / z;

• These may still be caught and/or propagated

upwards like normal exceptions.

Exception & RuntimeException

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