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Exceptions
What Is an Exception?
The Catch or Specify Requirement
Catching and Handling Exceptions
The try Block
The catch Blocks
The finally Block
The try-with-resources Statement
Putting It All Together
Specifying the Exceptions Thrown by a Method
How to Throw Exceptions
Chained Exceptions
Creating Exception Classes
Unchecked Exceptions — The Controversy
Advantages of Exceptions
Summary
Questions and Exercises
Trail: Essential Classes
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# Lesson: Exceptions

The Java programming language uses exceptions to handle errors and other exceptional events. This lesson describes when and how to use exceptions.

## What Is an Exception?

An exception is an event that occurs during the execution of a program that disrupts the normal flow of instructions.

## The Catch or Specify Requirement

This section covers how to catch and handle exceptions. The discussion includes the `try`, `catch`, and `finally` blocks, as well as chained exceptions and logging.

## How to Throw Exceptions

This section covers the `throw` statement and the `Throwable` class and its subclasses.

## The try-with-resources Statement

This section describes the `try`-with-resources statement, which is a `try` statement that declares one or more resources. A resource is as an object that must be closed after the program is finished with it. The `try`-with-resources statement ensures that each resource is closed at the end of the statement.

## Unchecked Exceptions — The Controversy

This section explains the correct and incorrect use of the unchecked exceptions indicated by subclasses of `RuntimeException`.

## Advantages of Exceptions

The use of exceptions to manage errors has some advantages over traditional error-management techniques. You'll learn more in this section.

## Summary

## Questions and Exercises

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