Interacting with APIs in Java | CodeSignal Learn

beginner

Interacting with APIs in Java

Full-Stack Engineering

4 courses

69 practices

5 hours

Transform your Java applications by connecting them to the world! This learning path equips you with essential skills for API integration—from crafting HTTP requests to implementing secure authentication and building robust test suites.

See courses

Earn a shareable

Certificate of Achievement

Verified skills you'll gain

DEVELOPING

End-to-End Testing and Debugging

DEVELOPING

Working with APIs

Tools you'll use

curl

Java

JUnit

JWT

Trusted by learners working at top companies

Course 1

Basics of HTTP Requests with Java

5 lessons

19 practices

In this course, you will learn how to interact with APIs using Java. By the end of this course, you’ll understand how to make GET, POST, PUT, PATCH, and DELETE requests to an API, interpret API responses, and perform basic operations like creating, reading, updating, and deleting resources.

See details

Course 2

Efficient API Interactions with Java

4 lessons

16 practices

In this course, you will learn how to handle common scenarios when working with APIs in Java. You’ll explore how to manage errors effectively, work with file uploads and downloads, handle paginated API responses, and use headers effectively. By the end of this course, you’ll have a deeper understanding of practical API techniques.

See details

Course 3

API Authentication Methods with Java

4 lessons

18 practices

In this course, you will learn how to work with various API authentication methods using Java. You’ll explore the basics of API Key authentication, manage sessions using cookies, and interact with APIs using JSON Web Tokens (JWTs). By the end of this course, you’ll be able to access and interact with protected APIs securely.

See details

Course 4

Automating API Tests with Java

4 lessons

16 practices

Build reliable API test suites using JUnit in Java. By the end of this course, you'll be able to set up test cases, make API requests within tests, assert expected outcomes, handle different testing scenarios including CRUD operations and authentication mechanisms. This will help you ensure the reliability and functionality of APIs effectively.

See details

Meet Cosmo:

The smartest AI guide in the universe

Our built-in AI guide and tutor, Cosmo, prompts you with challenges that are built just for you and unblocks you when you get stuck.

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.