Handling exceptions in Scala

Category : Scala | Sub Category : Scala Programs | By Prasad Bonam Last updated: 2023-10-21 03:57:56 Viewed : 243

In Scala, exceptions are handled using try, catch, and finally blocks, similar to other programming languages. You can use these blocks to manage and control exceptional conditions that may arise during the execution of your code. Here is an overview of handling exceptions in Scala:

scalaCopy code
try {
  // Code that may throw an exception
  val result = 10 / 0
} catch {
  case e: ArithmeticException => println("Arithmetic exception caught: " + e.getMessage)
} finally {
  // Code that will be executed regardless of whether an exception is caught
  println("Finally block executed")
}

In this example:

• The try block contains the code that may throw an exception, in this case, division by zero.
• The catch block is used to handle specific exceptions. Here, an ArithmeticException is caught, and a custom message is printed along with the exceptions message.
• The finally block is executed regardless of whether an exception is caught. It is typically used for cleanup tasks or ensuring certain operations are performed, regardless of whether an exception occurred.

Additionally, you can use the throw keyword to explicitly throw exceptions based on certain conditions:

scalaCopy code
if (condition) {
  throw new Exception("Custom exception message")
}

By using these techniques, you can effectively handle exceptions and ensure that your code can gracefully recover from unexpected errors, making it more robust and reliable.