Matcher reset() method in Java with Examples

The reset() method of Matcher Class is used to reset this matcher.

Syntax:

public Matcher reset()

Parameters: This method do not takes any parameter.

Return Value: This method returns this Matcher after being reset.

Below examples illustrate the Matcher.reset() method:

Example 1:

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// Java code to illustrate reset() 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);
  
        // Reset the Matcher using reset() method
        matcher = matcher.reset();
  
        // Get the current matcher state
        System.out.println(matcher.toMatchResult());
    }
}

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Output:

java.util.regex.Matcher[pattern=Geeks region=0, 13 lastmatch=]

Example 2:

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// Java code to illustrate reset() 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);
  
        // Reset the Matcher using reset() method
        matcher = matcher.reset();
  
        // Get the current matcher state
        System.out.println(matcher.toMatchResult());
    }
}

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Output:

java.util.regex.Matcher[pattern=GFG region=0, 19 lastmatch=]

Reference: Oracle Doc



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