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question about exception capturing

tan kian
Ranch Hand

Joined: Apr 09, 2004
Posts: 40
hi all, i just want to know something. is there an Exception for catching enter key on a readline.charAt(0)(ie. user just presses enter without entering anything else thus passing an empty string)?
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24166

If you write something like

and readLine() returns "" (the empty String) then yes, charAt() will throw a StringIndexOutOfBoundsException, as there is no 0th character in an empty String. Note also that at end-of-file, readLine() returns null, and you need to watch for that as well. Better to write something like

[Jess in Action][AskingGoodQuestions]
I agree. Here's the link:
subject: question about exception capturing
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