Exception Usage

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Tutorial: Exception Usage

The most common exceptions to catch are number conversion exceptions and I/O exceptions.

Tutorial Details:

Suggestions for catching exceptions
If you catch an exception, do something. Don't silence exceptions.
Some programs catch exceptions, then do nothing with them. This is almost always a mistake, and the underlying error should be fixed.
There are a few cases where you might want to silently ignore an exception. For example, changing the Look and Feel of the GUI may cause an exception. There's nothing to be done about it, so you don't want to stop execution.

Put larger blocks of code in a try clause
Altho an exception is generated by a single statement, an entire block of code is usually affected. It is often better to put the try around the block, not just single statements.
Don't catch exceptions that you can't really do anything with
If you can't do anything useful, don't catch an exception. Let someone higher up catch it.

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