java.util.regex.MatchResult.groupCount

Description

The java.time.MatchResult.groupCount() method returns the number of capturing groups in this match result's pattern.

Declaration

Following is the declaration for java.time.MatchResult.groupCount() method.

int groupCount()

Return Value

The number of capturing groups in this matcher's pattern.

Example

The following example shows the usage of java.time.MatchResult.groupCount() method.

package com.tutorialspoint;

import java.util.regex.MatchResult;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MatchResultDemo {
   private static final String REGEX = "(.*)(\\d+)(.*)";
   private static final String INPUT = "This is a sample Text, 1234, with numbers in between.";

   public static void main(String[] args) {
      // create a pattern
      Pattern pattern = Pattern.compile(REGEX);
      
      // get a matcher object
      Matcher matcher = pattern.matcher(INPUT); 

      if(matcher.find()) {
         //get the MatchResult Object 
         MatchResult result = matcher.toMatchResult();

         //Prints the number of capturing groups in this match result's pattern.
         System.out.println("Capturing Groups: "+result.groupCount());
      }
   }
}

Let us compile and run the above program, this will produce the following result −

First Capturing Group - Match String: This is a sample Text, 1234, with numbers in between.