Use exceptions with care

The JavaWorld experts answer your most pressing Java questions -- every week

Q: Please explain the following sentence: 'Use exceptions where you really need them -- not only do they have high basic cost, but their presence can hurt compiler analysis.'

A: Only when the situation is truly exceptional should you use this mechanism, though you may be tempted to throw exceptions simply to take advantage of their control-flow aspects. A good use of this mechanism would be to throw an exception if a file could not be found; a poor use would be to throw an exception with the name of a file that had been found. In the former case, the cost of the mechanism would only be incurred when the app was unable to proceed normally; in the latter case the cost would be incurred all the time without any added benefit.

Random Walk Computing is the largest Java/CORBA consulting boutique in New York, focusing on solutions for the financial enterprise. Known for their leading-edge Java expertise, Random Walk consultants publish and speak about Java in some of the most respected forums in the world.

Learn more about this topic

Join the discussion
Be the first to comment on this article. Our Commenting Policies