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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.

Tarun Telang

Tarun Telang is a passionate software engineer, leader, architect, author, and active contributor in various online technical forums.

Java Expert & Enterprise Software Architect

Mastering Regular Expressions in Java

Which of the following options represents a simple character class?


Which of the following options represents a simple character class?

Which of the following options represents a character range?

Which of the following options represents a character range?

Which of the following options represents any character? 

Which of the following options represents any character?

Which of the following options below represent a quantifier for zero or one occurrence?

Which of the following options below represent a quantifier for zero or one occurrence?

In regular expressions, which of the symbols below is used as an OR operator?

In regular expressions, which of the symbols below is used as an OR operator?

Which of the quantifiers below represents exactly 5 occurrences?


Which of the quantifiers below represents exactly 5 occurrences?

Which of the options below represents a predefined class for word boundary? 

Which of the options below represents a predefined class for word boundary?

Which of the quantifiers below represents between 2 and 4 occurrences?

Which of the quantifiers below represents between 2 and 4 occurrences?

Java regex APIs are located in which of the following packages?

Java regex APIs are located in which of the following packages?

Which exception is thrown in the case of an invalid regular expression?

Which exception is thrown in the case of an invalid regular expression?

Which class defines the constants corresponding to the flags for the regular expression pattern matching?

Which class defines the constants corresponding to the flags for the regular expression pattern matching?

Introduction

Java Regex APIs

Building Blocks of Regular Expressions

Course Wrap Up

Quiz