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What is a regex.PatternSyntaxException class in Java?

Educative Answers Team

A regular expression is a defined pattern used for matching and manipulating strings. In Java, there is a built-in API for regular expressions:

java.util.regex package

This package has three classes:

  1. Pattern class
  2. Matcher class
  3. PatternSyntax Exception class

This regular expression is not the property of one particular programming language; instead, it is supported by multiple languages.

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PatternSyntaxException class

The util.regex.PatternSyntaxException is used to indicate errors in a regular expression. Some commonly used methods are:

Methods Description
getDescription() It returns the description of the error.
getIndex() It returns the index where the error occurred.
getPattern() It returns the expression with the errors.
getMessage() It returns the string containg the description of the array.

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