Throwing Exceptions

• Exceptions:
  • Can't be overlooked
  • Sent directly to an exception handler–not just caller of failed method
• Throw an exception object to signal an exceptional condition
• Example: IllegalArgumentException: illegal parameter value

  IllegalArgumentException exception
        = new IllegalArgumentException("Amount exceeds balance");
  throw exception;

• No need to store exception object in a variable:

  throw new IllegalArgumentException("Amount exceeds balance");

• When an exception is thrown, method terminates immediately
  • Execution continues with an exception handler