Software Engineering

14,492 learners

Hashing, Dictionaries, and Sets in Java

Delve into Hashing, HashMaps, and HashSets in Java with this specialized course, exploring implementation, practical applications, and algorithmic problem-solving. Gain hands-on experience to confidently address data analysis and management challenges.

Java

See path

6 lessons

15 practices

2 hours

General Programming and Algorithms

Course details

Mastering Java HashSet: An In-depth Exploration of Implementation and Complexity Analysis

Preview

Tracking Unique Website Visitors with HashSet

Visitor Log Update with HashSet

Unique Visitor Tracker in Java

Next Course: Sorting and Searching Algorithms in Java

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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.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

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

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.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

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

Hashing, Dictionaries, and Sets in Java

Course details

Unit 13 practices26 min

Unit 22 practices20 min

Unit 32 practices20 min

Unit 44 practices32 min

Unit 52 practices20 min

Unit 62 practices20 min

Turn screen time into skills time

Join the 1M+ learners on CodeSignal

From our community

From our community