MatchResult start() method in Java with Examples
Last Updated :
27 Nov, 2018
The start() method of MatchResult Interface is used to get the start index of the match result already done.
Syntax:
public int start()
Parameters: This method do not takes any parameter.
Return Value: This method returns the index of the first character matched.0
Exception: This method throws IllegalStateException if no match has yet been attempted, or if the previous match operation failed.
Below examples illustrate the MatchResult.start() method:
Example 1:
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
String regex = "(G*k)" ;
Pattern pattern
= Pattern.compile(regex);
String stringToBeMatched = "Geeks" ;
MatchResult matcher
= pattern
.matcher(stringToBeMatched);
while (((Matcher)matcher).find()) {
System.out.println(matcher.start());
}
}
}
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Example 2:
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
String regex = "(G*G)" ;
Pattern pattern
= Pattern.compile(regex);
String stringToBeMatched = "GFG" ;
MatchResult matcher
= pattern
.matcher(stringToBeMatched);
while (((Matcher)matcher).find()) {
System.out.println(matcher.start());
}
}
}
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