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Modify by throwing

Jeffery Miller
Greenhorn

Joined: Jan 16, 2008
Posts: 2
I need some help to modify the perimeter method in the following program so it will throw an Exception object. Guidence or an example would be appriciated.


Bill Shirley
Ranch Hand

Joined: Nov 08, 2007
Posts: 457


Bill Shirley - bshirley - frazerbilt.com
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Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39784
    
  28
"ouch". Yes, it will work, but because it is a checked Exception it requires a "throws" or a "try-catch."
Go into your Java folder on your PC, and explore it until you find a file called src.zip. Unzip that, find a method which throws an Exception, and examine that.
Find the java folder, in that the awt folder, in that the Color class, then inspect its constructors. See how they deal with Exceptions. Have a look at the Java Tutorial here.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39784
    
  28
I really ought to learn to read. I see you already have a try-catch, but not a "throws." You ought not to catch "Exception," but a subclass on Exception.
When I said "method which throws Exceptions" the constructor I quoted is a similar example.
 
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