The reset(CharSequence input) method of Matcher Class is used to reset this matcher and insert the input String passed as the parameter to this matcher.
Syntax:
public Matcher reset(CharSequence input)
Parameters: This method takes the parameter input which is the String to be inserted into matcher after getting reset.
Return Value: This method returns this Matcher after being reset with this input.
Below examples illustrate the Matcher.reset() method:
Example 1:
// 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); // Get the current matcher state System.out.println("Current Matcher: " + matcher.toMatchResult()); // Reset the Matcher using reset() method String newStringToBeMatched = "GeeksGeeksGeeks"; matcher = matcher .reset(newStringToBeMatched); // Get the current matcher state System.out.println("Current Matcher after Reset: " + matcher.toMatchResult()); }} |
Current Matcher: java.util.regex.Matcher[pattern=Geeks region=0,13 lastmatch=]
Current Matcher after Reset: java.util.regex.Matcher[pattern=Geeks region=0,15 lastmatch=]
Example 2:
// 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); // Get the current matcher state System.out.println("Current Matcher: " + matcher.toMatchResult()); // Reset the Matcher using reset() method String newStringToBeMatched = "GFG means GeeksForGeeks"; matcher = matcher .reset(newStringToBeMatched); // Get the current matcher state System.out.println("Current Matcher after Reset: " + matcher.toMatchResult()); }} |
Current Matcher: java.util.regex.Matcher[pattern=GFG region=0,19 lastmatch=]
Current Matcher after Reset: java.util.regex.Matcher[pattern=GFG region=0,23 lastmatch=]
Reference: Oracle Doc