Matcher find(int) method in Java with Examples

The find(int start) method of Matcher Class attempts to find the next subsequence after the specified subsequence number, passed as parameter, of the input sequence that find the pattern. It returns a boolean value showing the same.

Syntax:

public boolean find(int start)

Parameters: This method takes a parameter start which is the subsequence number after which the next subsequence is to be found.

Return Value: This method returns a boolean value showing whether a subsequence of the input sequence find this matcher’s pattern

Exception: This method throws IndexOutOfBoundsException if start is less than zero or greater than the length of the input sequence.

Below examples illustrate the Matcher.find() method:

Example 1:

// Java code to illustrate find() 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 subsequence
        // using find() method
        System.out.println(matcher.find(1));
    }
}

Output:

true

Example 2:

// Java code to illustrate find() 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 subsequence
        // using find() method
        System.out.println(matcher.find(0));
    }
}

Output:

true

Reference: Oracle Doc