In today’s video, I will show you how to implement the equals and hashcode mehods of your entities. You will learn how to implement these methods so that they fulfil the requirements of the Java language, the JPA specification and Hibernate. I will also show you which attributes you should never include in your equals method. My consulting clients and people in my workshops and conference talks ask me all the time about these two methods. So, let’s answer these questions once and for all in this video.
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OK, let’s get into today’s topic.
The implementation of the equals() and hashCode() methods for entity classes is an often discussed question.
Do you really need them? There are lots of applications that work perfectly fine using Java’s default methods provided by the Object class.
And if you need to implement them, how should you do that? Should you use all attributes or just the primary keys?
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