03
Sep
11

scala catching exceptions



Here’s a way to deal with possible exceptions in Scala. Let’s say your application takes command line arguments, and it will work with either 2 or 3 arguments. The thing is, if you have 2 and you try to acces the 3rd, you’ll get an ArrayIndexOutOfBoundsException. Of course, you could check the size before accessing. But, let’s just see another way:


import scala.util.control.Exception._

val firstArgument     = args(0)
val secondArgument = args(1)
val thirdArgument     = catching(classOf[ArrayIndexOutOfBoundsException]).opt(args(2)).getOrElse("default value")

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