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Matcher pattern() method in Java with Examples
  • Last Updated : 26 Nov, 2018

The pattern() method of Matcher Class is used to get the pattern to be matched by this matcher.

Syntax:

public Pattern pattern()

Parameters: This method do not accepts any parameter.

Return Value: This method returns a Pattern which is the pattern to be matched by this Matcher.

Below examples illustrate the Matcher.pattern() method:



Example 1:




// Java code to illustrate pattern() method
  
import java.util.regex.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the regex to be checked
        String regex = "Geeks";
  
        // Create a pattern from regex
        Pattern pattern
            = Pattern.compile(regex);
  
        // 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: "
                           + matcher.pattern());
    }
}
Output:
Pattern: Geeks

Example 2:




// Java code to illustrate pattern() method
  
import java.util.regex.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the regex to be checked
        String regex = "GFG";
  
        // Create a pattern from regex
        Pattern pattern
            = Pattern.compile(regex);
  
        // 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: "
                           + matcher.pattern());
    }
}
Output:
Pattern: GFG

Reference: Oracle Doc

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