Scanner useDelimiter() method in Java with Examples
useDelimiter(Pattern pattern)
The useDelimiter(Pattern pattern) method of java.util.Scanner class sets this scanner’s delimiting pattern to the specified pattern.
Syntax:
public Scanner useDelimiter(Pattern pattern)
Parameter: The function accepts a mandatory parameter pattern which specifies a delimiting pattern.
Return Value: The function returns this scanner.
Below programs illustrate the above function:
Program 1:
Java
// Java program to illustrate the useDelimiter(Pattern Pattern)// method of Scanner class in Javaimport 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.
useDelimiter(String pattern)
The useDelimiter(String pattern) method of java.util.Scanner class Sets this scanner’s delimiting pattern to a pattern constructed from the specified String.
Syntax:
public Scanner useDelimiter(String pattern)
Parameter: The function accepts a mandatory parameter string pattern which specifies a delimiting pattern.
Return Value: The function returns this scanner.
Below programs illustrate the above function:
Program 1:
Java
// Java program to illustrate the useDelimter(String Pattern)// method of Scanner class in Javaimport 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
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#useDelimiter(java.lang.String)
