Working with Nulls in Java

In this Java tutorial you will learn the best practices and techniques to handle nulls and avoid NullPointerExceptions in Java.

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.

• Course Overview 1min
• Working with Reference Types and Nulls 21mins
• Checking for Null Using Annotations 21mins
• Using the Null Object Pattern 11mins
• Using Optional Instead of Null 16mins