How to Throw & Handle Scala Exceptions

In Scala, exception handling is a crucial mechanism to manage unexpected events during program execution, with exceptions categorized as either checked or unchecked; however, Scala supports only unchecked exceptions. To handle exceptions, Scala employs a try/catch block similar to Java, but it utilizes pattern matching in the catch block to identify exceptions. The exception hierarchy in Scala is rooted in the Throwable class, with Exception and Error as two main branches, where Exception is intended for conditions that programs should catch, and Error indicates issues related to the Java runtime environment. The language also allows the creation of custom exceptions by extending the Exception class, enabling developers to define specific conditions and messages. The try/catch construct in Scala can include a finally clause to ensure certain code executes regardless of exceptions, which is useful for resource management like closing database connections. Tools like Rollbar provide automated error monitoring and triaging to enhance error management and confidence in deploying production code.