HomeCoursesMastering Regular Expressions in Java

4.5

Beginner

1h 20min

Mastering Regular Expressions in Java

Quickly familiarize yourself with regular expressions in Java and learn how to use them in various use-cases related to string manipulation.

Join 2.7 million developers at

Overview

Content

Reviews

Regular expressions describe a pattern of characters used for searching a string. They are very useful for parsing information like dates, phone numbers, or zip codes from important text files such as code files, log files, spreadsheets, or documents. Below are the most common use cases of regular expressions: - Data validation of data fields or values like phone numbers, zip codes, email addresses, etc. - Information extraction from text files for further processing - Pattern matching of strings or textual information - Search and replace operation on texts This course will teach you how to perform pattern matching with a regular expression using a Java API for these practical use cases.

Regular expressions describe a pattern of characters used for searching a string. They are very useful for parsing information l...Show More

WHAT YOU'LL LEARN

Introduction to regular expressions

Using regular expression APIs from java.util.regex package

Different types of characters, and whitespaces

Character classes, meta-characters and qualifiers

Character ranges and character repetitions

Using Pattern, Group and Matcher classes

Creating regular expression patterns using flags

Making regular expressions more accurate using modifiers

How to match single, multiple and range of characters using optional characters and wildcards

Performing search and replace operation on strings using regular expressions

Analyzing text files with regular expressions

Using named groups in regular expressions

Introduction to regular expressions

TAKEAWAY SKILLS

Strings

Object Oriented Programming

Content

13 Lessons2 Quizzes

Introduction

2 Lessons

Course Overview

Introduction to Regular Expressions

Java Regex APIs

2 Lessons

Regular Expression APIs in Java

Replacement Methods of Matcher Class

Building Blocks of Regular Expressions

4 Lessons

Characters Types and Meta-Characters

Pattern Matching Using Character Classes

Pattern Matching Using Quantifiers

Regular Expressions with String Methods

Course Wrap Up

5 Lessons

Summary

Quiz

Regular Expression Tester

Exercise

Conclusion

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Course Author:

Tarun Telang

Developed by MAANG Engineers

Every Educative lesson is designed by a team of ex-MAANG software engineers and PhD computer science educators, and developed in consultation with developers and data scientists working at Meta, Google, and more. Our mission is to get you hands-on with the necessary skills to stay ahead in a constantly changing industry. No video, no fluff. Just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

Trusted by 2.7 million developers working at companies

"These are high-quality courses. Trust me. I own around 10 and the price is worth it for the content quality. EducativeInc came at the right time in my career. I'm understanding topics better than with any book or online video tutorial I've done. Truly made for developers. Thanks"

Anthony Walker

@_webarchitect_

"Just finished my first full #ML course: Machine learning for Software Engineers from Educative, Inc. ... Highly recommend!"

Evan Dunbar

ML Engineer

"You guys are the gold standard of crash-courses... Narrow enough that it doesn't need years of study or a full blown book to get the gist, but broad enough that an afternoon of Googling doesn't cut it."

Software Developer

Carlos Matias La Borde

"I spend my days and nights on Educative. It is indispensable. It is such a unique and reader-friendly site"

Souvik Kundu

Front-end Developer

"Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content."

Vinay Krishnaiah

Software Developer

Hands-on Learning Powered by AI

See how Educative uses AI to make your learning more immersive than ever before.

Personalized Interview Prep

Skip the LeetCode grind with a custom roadmap that adapts to your goals. Hands-on practice for Coding Interviews, System Design, and more.

Mock Interviews

Test your skills in a simulated interview setting. Receive personalized feedback based on your performance. Available for Coding Interviews, System Design, and more.

AI Prompt

Build prompt engineering skills. Practice implementing AI-informed solutions.

Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

Explain with AI

Select any text within any Educative course, and get an instant explanation — without ever leaving your browser.

AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Free Resources