# 1. Java Essentials

## Contents

1. [Abstraction](https://emory.gitbook.io/dsa-java/java-essentials/abstraction)
2. [Implementation](https://emory.gitbook.io/dsa-java/java-essentials/implementation)
3. [Unit Testing](https://emory.gitbook.io/dsa-java/java-essentials/unit-testing)
4. [Quiz](https://emory.gitbook.io/dsa-java/java-essentials/exercises)

## Resources

* Main: [src/main/java/edu/emory/cs/algebraic](https://github.com/emory-courses/dsa-java/tree/master/src/main/java/edu/emory/cs/algebraic)
* Test: [src/test/java/edu/emory/cs/algebraic](https://github.com/emory-courses/dsa-java/tree/master/src/test/java/edu/emory/cs/algebraic)

## References

* [TIOBE Programming Community Index](https://www.tiobe.com/tiobe-index)
* [PYPL Popularity of Programming Language](https://pypl.github.io)

{% hint style="info" %}
Please follow every example described in this section.  **Programming is an act of writing, not reading.** By the end of this chapter, you should be able to reproduce the entire codebase yourself from scratch without consulting those examples.
{% endhint %}


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