Matcher end() method in Java with Examples
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 = "w3wiki" ; // 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()); } } } |
Output:
Current Matcher: java.util.regex.Matcher[pattern=(G*G) region=0,11 lastmatch=]
1
3
6
9
11
Reference: Oracle Doc
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