Custom exception in java medium

Overview

In this article, we'll cover the process of creating custom both checked and unchecked exceptions in Java.

If you'd like to read more about exceptions and exception handling in Java, we've covered it in detail in - Exception Handling in Java: A Complete Guide with Best and Worst Practices

Why Use Custom Exceptions?

Although Java exceptions, as they are, cover nearly all exceptional cases and conditions, your application might throw a specific custom exception, unique to your code and logic.

Sometimes, we need to create our own for representing business logic exceptions, i.e.

exceptions that are specific to our business logic or workflow. For example , , etc.

They help application clients to better understand what went wrong. They are particularly useful for doing exception handling for REST APIs as different business logic constraints require different response codes to be sent back to the client.

If defining a custom exception doesn't provide benefit over using a regular exception in Java, there's n

how to create custom checked and custom unchecked exception in java

list of checked exceptions in java