Loading...

Computer Programming

162 learners

Java Streams Mastery

This course will guide you through the powerful Stream API in Java. You'll learn how to process data with streams, perform intermediate and terminal operations, and effectively manipulate collections of data.

Java

See path

6 lessons

31 practices

4 hours

Computer Science Fundamentals

Lessons and practices

Lesson 1: Getting Started with the Stream API

Streams in Action

Using the count Method

Using findAny and findFirst

Fix Stream Reuse Bug

Stream with Countries

Lesson 2: Intermediate Operations: Filtering, Mapping, and Transforming Streams

Intermediate Stream Operations in Action

Advanced Stream Filter Conditions

Chaining Multiple Operations

Stream Troubleshooting Challenge

Filter and Transform Job Titles

Lesson 3: Advanced Intermediate Operations: Sorting, Distinct, and Limiting

Advanced Stream Operations in Action

Refining Stream Operation

Fix Stream Operation Order

Filter, Map and Sort

Stream Operations on Employee Salaries

Lesson 4: Boolean Matching with Streams

Boolean Matching with Streams

Validating File Paths with Boolean Matching

Fix Boolean Matching Logic

Validating Exercise Durations

Boolean Checks on Temperature Data

Lesson 5: Collecting and Reducing Streams

Collecting and Reducing

Collecting into Different Collections

Fix the Summation Bug

Multiply and Reduce

Unifying Unique Words

Lesson 6: Mastering Stream Operations: Advanced Practices

Streams with Classes

Monthly Sales Analyzer

Top Products Selector

Employee Salary Calculator

Processing Marathon Data

Ultimate Library Catalog Challenge

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.