public Scanner useDelimiter(Pattern pattern)

// Java program to illustrate the useDelimiter(Pattern Pattern)
// method of Scanner class in Java
 
import java.util.*;
import java.util.regex.Pattern;
 
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {
 
        String s = "Geeksforgeeks has Scanner Class Methods";
 
        // create a new scanner
        // with the specified String Object
        Scanner scanner = new Scanner(s);
 
        // print a line of the scanner
        System.out.println("Scanner String: \n"
                           + scanner.nextLine());
 
        // display the old delimiter
        System.out.println("Old delimiter: "
                           + scanner.delimiter());
 
        // change the delimiter of this scanner
        scanner.useDelimiter(Pattern.compile(".ll."));
 
        // display the new delimiter
        System.out.println("New delimiter: "
                           + scanner.delimiter());
 
        // close the scanner
        scanner.close();
    }
}

Scanner String: 
Geeksforgeeks has Scanner Class Methods
Old delimiter: \p{javaWhitespace}+
New delimiter: .ll.

public Scanner useDelimiter(String pattern)

// Java program to illustrate the useDelimter(String Pattern)
// method of Scanner class in Java
 
import java.util.*;
 
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {
 
        String s = "Geeksforgeeks has Scanner Class Methods";
 
        // create a new scanner
        // with the specified String Object
        Scanner scanner = new Scanner(s);
 
        // print a line of the scanner
        System.out.println("Scanner String: \n"
                           + scanner.nextLine());
 
        // print the old delimiter
        System.out.println("Old Delimiter: "
                           + scanner.delimiter());
 
        // change the delimiter
        scanner.useDelimiter("Wor");
 
        // print the new delimiter
        System.out.println("New Delimiter: "
                           + scanner.delimiter());
 
        // close the scanner
        scanner.close();
    }
}

Scanner String: 
Geeksforgeeks has Scanner Class Methods
Old Delimiter: \p{javaWhitespace}+
New Delimiter: Wor