Skip to content
Related Articles

Related Articles

Improve Article
Save Article
Like Article

Matcher groupCount() method in Java with Examples

  • Last Updated : 26 Nov, 2018

The groupCount() method of Matcher Class is used to get the number of capturing groups in this matcher’s pattern.

Syntax:

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.

public int groupCount()

Parameters: This method do not takes any parameter.

Return Value: This method returns the number of capturing groups in this matcher’s pattern.



Below examples illustrate the Matcher.groupCount() method:

Example 1:




// Java code to illustrate groupCount() 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 number of capturing groups
        // using groupCount() method
        System.out.println(matcher.groupCount());
    }
}
Output:
0

Example 2:




// Java code to illustrate groupCount() 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 number of capturing groups
        // using groupCount() method
        System.out.println(matcher.groupCount());
    }
}
Output:
0

Reference: Oracle Doc




My Personal Notes arrow_drop_up
Recommended Articles
Page :

Start Your Coding Journey Now!