Mapping Relationships with Hibernate

Mapping Relationships with Hibernate

Author: Trevor Page: Java Guru | Programmer | Teacher July 23, 2014 Duration: 55:48
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In the past we have learned about database relationships, specifically the One-to-Many as well as the Many-to-Many and One-to-One and that was all good, great and grand…

But now I want to talk about how to create those same relationships inside of Hibernate.

Specifically, I want to focus on the One-to-Many relationship in Hibernate and how we go about mapping it out in our Java objects.

But before we do, a word on unidirectional and bidirectional relationships.

Unidirectional vs Bidirectional

In Hibernate, it's possible to map all three relationships that are available in a standard database, these include:

  • One-to-One
  • One-to-Many
  • Many-to-Many

But what Hibernate also includes is the ability to make EACH of those relationships either unidirectional or bidirectional.

This means that we can have a unidirectional One-to-One and a bidirectional One-to-One mapping, as well as a unidirectional One-to-Many and a bidirectional One-to-Many, as well as a unidirectional Many-to-Many and a bidirectional Many-to-Many relationship.

That's a lot of relationships!

So what exactly are unidirectional and bidirectional relationships?

Learn more on the show notes page via http://howtoprogramwithjava.com/session53


The How to Program with Java Podcast is a practical guide for anyone wanting to build software, from curious beginners to those looking to solidify their professional skills. Host Trevor Page, a seasoned Java guru and teacher, breaks down complex programming concepts into clear, manageable lessons you can apply immediately. You'll hear detailed walkthroughs on building applications, understanding core principles like object-oriented design, and navigating the tools of the trade. The discussions move beyond dry theory, focusing on the real-world logic and problem-solving that defines a career in software development. Whether you're aiming for a new job, tackling a personal project, or helping a child explore technology, this podcast provides a structured, conversational path forward. Each episode is crafted to demystify the process, translating technical jargon into plain English so you can focus on creating functional code. The tone is direct and encouraging, rooted in Trevor's experience as both a programmer and an educator. It’s a resource for building a tangible skill set, episode by episode, where consistent listening translates directly to growing competency. You’ll find the content naturally bridges the categories of technology education and career development, making it a useful companion for your learning journey.
Author: Language: English Episodes: 113

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