Matcher end() method in Java with Examples

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The end() method of Matcher Class is used to get the offset after the last character matched of the match result already done.

Syntax:

public int end()

Parameters: This method do not takes any parameter.

Return Value: This method returns the offset after the last character matched

Exception: This method throws IllegalStateException if no match has yet been attempted, or if the previous match operation failed.

Below examples illustrate the Matcher.end() method:

Example 1:

// Java code to illustrate end() method
  
import java.util.regex.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the regex to be checked
        String regex = "(G*s)";
  
        // 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 current matcher state
        MatchResult result
            = matcher.toMatchResult();
        System.out.println("Current Matcher: "
                           + result);
  
        while (matcher.find()) {
            // Get the last index of match result
            System.out.println(matcher.end());
        }
    }
}

Output:

Current Matcher: java.util.regex.Matcher[pattern=(G*s) region=0,13 lastmatch=]5
13

Example 2:

// Java code to illustrate end() method
  
import java.util.regex.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the regex to be checked
        String regex = "(G*G)";
  
        // Create a pattern from regex
        Pattern pattern
            = Pattern.compile(regex);
  
        // Get the String to be matched
        String stringToBeMatched
            = "GFG FGF GFG";
  
        // Create a matcher for the input String
        Matcher matcher
            = pattern
                  .matcher(stringToBeMatched);
  
        // Get the current matcher state
        MatchResult result
            = matcher.toMatchResult();
        System.out.println("Current Matcher: "
                           + result);
  
        while (matcher.find()) {
            // Get the last index of match result
            System.out.println(matcher.end());
        }
    }
}