Java Matcher pattern() Method Last Updated : 11 Apr, 2025 Summarize Comments Improve Suggest changes Share Like Article Like Report Try it on GfG Practice The pattern() method of the Matcher class is used to get the pattern to be matched by this matcher.Example 1: The below example demonstrates how the pattern() method retrieves the regex pattern "G.*s$" used to match a string ending with "s" and starting with "G". Java // Java code to illustrate pattern() method import java.util.regex.*; public class Geeks { public static void main(String[] args) { // Create a pattern from regex Pattern pattern = Pattern.compile("G.*s$"); // Get the String to be matched String stringToBeMatched = "GeeksForGeeks"; // Create a matcher for the input String Matcher matcher = pattern.matcher(stringToBeMatched); // Get the Pattern using pattern() method System.out.println("Pattern used: " + matcher.pattern()); } } OutputPattern used: G.*s$ Syntaxpublic Pattern pattern()Parameter: This method does not accept any parameter(s). Return Value: This method returns a Pattern which is the pattern to be matched by this Matcher. Example 2: The below example shows how the pattern() method returns the exact pattern "GFG" used to match repetitive occurrences in a string. Java // Java code to illustrate pattern() method import java.util.regex.*; public class Geeks { public static void main(String[] args) { // Create a pattern from regex Pattern pattern = Pattern.compile("GFG"); // Get the String to be matched String stringToBeMatched = "GFGFGFGFGFGFGFGFGFG"; // Create a matcher for the input String Matcher matcher = pattern.matcher(stringToBeMatched); // Get the Pattern using pattern() method System.out.println("Pattern used: " + matcher.pattern()); } } OutputPattern used: GFG Comment More infoAdvertise with us Next Article Java Pattern pattern() Method K Kirti_Mangal Follow Improve Article Tags : Java Java - util package Java-Functions Java-Matcher Practice Tags : Java Similar Reads Java Pattern pattern() Method pattern() method of the Pattern class in Java is used to get the regular expression which is compiled to create this pattern. We use a regular expression to create the pattern and this method is used to get the same source expression. Example 1: Using the pattern() method to check the regex pattern 2 min read Matcher toString() method in Java with Examples The toString() method of Matcher Class is used to get the String representation of this matcher. This method is derived from the Object Class and behaves in the similar way. Syntax: public String toString() Parameters: This method takes no parameters. Return Value: This method returns a String value 2 min read Matcher start() method in Java with Examples The start() method of Matcher Class is used to get the start index of the match result already done. Syntax: public int start() Parameters: This method do not takes any parameter. Return Value: This method returns the index of the first character matched.0 Exception: This method throws IllegalStateE 2 min read Matcher usePattern(Pattern) method in Java with Examples The usePattern() method of Matcher Class is used to get the pattern to be matched by this matcher. Syntax: public Matcher usePattern(Pattern newPattern) Parameters: This method takes a parameter newPattern which is the new pattern to be set. Return Value: This method returns a Matcher with the new P 2 min read Matcher start(String) method in Java with Examples The start(String string) method of Matcher Class is used to get the start index of the match result already done, from the specified string. Syntax: public int start(String string) Parameters: This method takes a parameter string which is the String from which the start index of the matched pattern 2 min read Pattern matcher(CharSequence) method in Java with Examples The matcher(CharSequence) method of the Pattern class used to generate a matcher that will helpful to match the given input as parameter to method against this pattern. The Pattern.matcher() method is very helpful when we need to check a pattern against a text a single time, and the default settings 2 min read Like