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Introduction to Regular Expressions in Java

Software Engineering

4 courses

Master Java regex to solve complex text challenges. Move from basic matching and data extraction to advanced lookaheads and performance tuning. Build professional ETL pipelines, handle Unicode, and write efficient, maintainable code for real-world programming tasks.

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Tools you'll use

Java

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You'll start your journey into regular expressions by learning the core concepts. You will write patterns to find text, use special characters to define rules, and learn how to match specific parts of a string. This course builds the essential foundation for all your future text-processing tasks in Java.

Course 2

Extracting Data with Capture Groups in Java

4 lessons

15 practices

Go beyond simple matching and learn to pull specific data out of text. You'll use capture groups to parse structured information, find repeated patterns, and perform powerful text transformations. This course will equip you to clean, reformat, and extract valuable data from any string with precision.

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Course 3

Regex Validation, Flags, and Text Processing in Java

4 lessons

16 practices

Move into advanced regex techniques for robust data processing. You'll write patterns to validate user input, control matching with flags for readability and power, and use lookaheads for complex conditional logic. Finally, you'll learn to process large text files efficiently, a key skill for real-world data.

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Course 4

Real-World Regex in Java: Performance and Integration

4 lessons

15 practices

Put all your skills together to build production-ready regex. You'll learn to write fast, efficient patterns, handle international text, and create maintainable code. The course culminates in a capstone project where you build a complete data processing pipeline from scratch, just like a professional.

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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

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

Introduction to Regular Expressions in Java

Verified skills you'll gain

Trusted by learners working at top companies

Turn screen time into skills time

Join the 1M+ learners on CodeSignal

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