Free
Course

Learn Intermediate Java: Generics and Collections

Dive into generics and Collections in Java and see how they can help you write more advanced code.

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  • Skill level

    Intermediate

  • Time to complete

    Approx. 2 hours

  • Certificate of completion

    Included with paid plans

  • Prerequisites

    1 course

About this course

Generics allow us to create generic classes and methods by specifying a type parameter. In this course, you’ll learn about generics in Java, their use cases, and how these topics can help you create scalable, type-safe code. Then you’ll explore the Java Collections framework, which helps overcome the limits of an array and provides more complex functionality to meet different collection needs.

Skills you'll gain

  • Implement generics in Java

  • Use wildcards in your code

  • Implement Sets, Maps, and more

Syllabus

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Hands-on learning

Don’t just watch or read about someone else coding — write your own code live in our online, interactive platform. You’ll even get AI-driven recommendations on what you need to review to help keep you on track.
Animated demonstration of running code in Codecademy's learning environment

Projects in this course

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  • Practice Projects

    Guided projects that help you solidify the skills and concepts you're learning.

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    Auto-graded quizzes and immediate feedback help you reinforce your skills as you learn.

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