Errors happen all the time in the software world. It might be an invalid user input or an external system that is not responding, or it’s a simple programming error. In all these situations, the errors occur at runtime and the application needs to handle them. Otherwise, it crashes and can’t process further requests. Java provides a powerful mechanism which allows you to handle the exceptional event where it occurred or in one of the higher methods in the call stack.

An exception is a known type of error. An unhandled exception occurs when the application code does not properly handle exceptions. For example, When you try to open a file on disk, it is a common problem for the file to not exist. The.NET Framework will then throw a FileNotFoundException. This is a simple example of a potential known problem that is accounted for within the code. Let’s take this code sample below.