Matcher start(int) method in Java with Examples

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:

Java

// Java code to illustrate start() method

import java.util.regex.*;

public class GFG {
    public static void main(String[] args)
    {

        // Get the regex to be checked
        String regex = "(G*k)";

        // Create a pattern from regex
        Pattern pattern
            = Pattern.compile(regex);

        // Get the String to be matched
        String stringToBeMatched = "Geeks";

        // Create a matcher for the input String
        MatchResult matcher
            = pattern
                  .matcher(stringToBeMatched);

        while (((Matcher)matcher).find()) {
            // Get the first index of match result
            System.out.println(matcher.start());
        }
    }
}

Output:

Example 2:

Java

// Java code to illustrate start() 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";

        // Create a matcher for the input String
        MatchResult matcher
            = pattern
                  .matcher(stringToBeMatched);

        while (((Matcher)matcher).find()) {
            // Get the first index of match result
            System.out.println(matcher.start());
        }
    }
}

Output:

0
2

=

Matcher start(int) method in Java with Examples

K

Kirti_Mangal

Improve

Article Tags :

Practice Tags :

Java

Similar Reads

MatchResult start(int) method in Java with Examples

The start(int group) method of MatchResult Interface is used to get the start index of the match result already done, from the specified group. Syntax: public int start(int group) Parameters: This method takes a parameter group which is the group from which the start index of the matched pattern is

Matcher start() method in Java with Examples

The start() method of Matcher Class 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 IllegalStateE

String matches() Method in Java with Examples

In Java, the matches() method in the String class checks if a string matches a specified regular expression. It is useful for validating input patterns and searching within strings. In this article, we will learn how to use the matches() method effectively in Java with examples to illustrate its fun

Matcher start(int) method in Java with Examples

The start(int group) method of Matcher Class is used to get the start index of the match result already done, from the specified group. Syntax: public int start(int group) Parameters: This method takes a parameter group which is the group from which the start index of the matched pattern is required

MatchResult end() method in Java with Examples

The end() method of MatchResult Interface 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:

Matcher regionStart() method in Java with Examples

The regionStart() method of Matcher Class is used to get the startIndex of the region to be matched by the pattern in the current matcher. This method returns an integer value which is the startIndex of the region of this matcher. Syntax: public int regionStart() Parameters: This method takes no par

MatchResult group() method in Java with Examples

The group() method of MatchResult Interface is used to get the input subsequence matched by the previous match result.Syntax: public String group() Parameters: This method do not takes any parameter.Return Value: This method returns the String which is the input subsequence matched by the previous m

Matcher start(String) method in Java with Examples

The start(String string) method of Matcher Class is used to get the start index of the match result already done, from the specified string. Syntax: public int start(String string) Parameters: This method takes a parameter string which is the String from which the start index of the matched pattern

Matcher reset() Method in Java with Examples

The reset() method of Matcher Class is used to reset this matcher, in order to understand it better it is recommended to have prior knowledge of Pattern and Matcher class in java regex sub-package. Here we will be illustrating it with help of Java programs. Syntax: public Matcher reset() Parameters:

Matcher toString() method in Java with Examples

The toString() method of Matcher Class is used to get the String representation of this matcher. This method is derived from the Object Class and behaves in the similar way. Syntax: public String toString() Parameters: This method takes no parameters. Return Value: This method returns a String value