Working with Nulls in Java

By Esteban Herrera
Learn the best practices and techniques to handle nulls effectively in Java.
Play course overview
Course info
Rating
(48)
Level
Intermediate
Updated
Dec 30, 2019
Duration
1h 12m
Table of contents
Course Overview
Course Overview 1m
Working with Reference Types and Nulls
Introduction 3m Null and Reference Types 5m Traditional Ways of Dealing with Nulls 3m Best Practices for Data That You Don't Control 6m Best Practices for Data That You Control 2m Summary 3m
Checking for Null Using Annotations
Introduction 4m Spring Annotations 6m Bean Validation Annotations 5m Project Lombok Annotations 5m Final Thoughts 2m
Using the Null Object Pattern
Understanding the Null Object Pattern 3m Implementing the Null Object Pattern 4m Criticisms of the Null Object Pattern 2m Things to Remember 2m
Using Optional Instead of Null
The Optional Type 4m Optional Type Good Practices 4m Using the Optional Type 3m Things to Keep in Mind About the Optional Type 2m Course Summary 5m
Description
Course info
Rating
(48)
Level
Intermediate
Updated
Dec 30, 2019
Duration
1h 12m
Description

How many times have you thought "this object can never be null" only to be proven wrong? In this course, Working with Nulls in Java, you'll learn best practices for effectively handling nulls and avoid NullPointerExceptions. First, you'll see what nulls mean and some common ways to deal with them. Next, you'll explore how to use annotations to check for nulls. Finally, you'll discover how to use the Null Object pattern and the Optional type to reduce unexpected exceptions even further. When you're finished with this course, you'll understand the different techniques to handle nulls effectively in Java programs.

About the author
Esteban Herrera
About the author

Esteban Herrera has more than twelve years of experience in the software development industry. Having worked in many roles and projects, he has found his passion in programming with Java and JavaScript. Nowadays, he spends all his time learning new things, writing articles, teaching programming, and enjoying his kids.

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Section Introduction Transcripts
Section Introduction Transcripts

Course Overview
Hi, everyone. My name is Esteban Herrera. Welcome to my course, Working with Nulls in Java. I've been working with Java for more than 10 years. I love the language and teaching all I know about it. How many times have you thought this object can never be null just to be proven wrong with an ugly null pointer exception when you run your program? I bet more than one time, right? The fact is null pointer exception is one of the most common exceptions in Java programs. In this course, you are going to learn good practices and techniques for effectively handling nulls and avoid null pointer exceptions. Some of the major topics that we will cover include what exactly is null, checking for null using annotations, the null object pattern, and using optionals instead of nulls. By the end of this course, you will know how to deal with nulls effectively. Before beginning the course, you should have at least a basic knowledge of Java 8 or above. I hope you'll join me on this journey to learn how to handle nulls effectively with the course Working with Nulls in Java at Pluralsight.

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