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