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regex. Matcher is a programme that searches a text for multiple instances of a regular expression. A Matcher can also be used to look for the same regular expression in many texts. There are several useful methods in the Java Matcher class.

All forms of text search and text replace operations can be performed with regular expressions. Although Java lacks a built-in Regular Expression class, we can deal with regular expressions by importing the java. util. regex library.

  • Use the compile(String regex) API function of Pattern to convert a String regular expression to a Pattern.
  • Create a Matcher using the Pattern's matcher(CharSequence input) API method, which will match the given String input against this pattern.

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