Scanner radix() method in Java with Examples

Last Updated : 11 Jul, 2025
The radix() method of java.util.Scanner class returns this scanner's default radix. Syntax: 
public int radix()
Return Value: This function returns the default radix of this scanner. Below programs illustrate the above function: Program 1: Java 
// Java program to illustrate the
// radix() 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 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 default radix
        System.out.println("Default Radix value: "
                           + scanner.radix());

        // close the scanner
        scanner.close();
    }
}
Output: 
Scanner String:
Geeksforgeeks has Scanner methods
Default Radix value: 10
Program 2: Java 
// Java program to illustrate the
// radix() method of Scanner class in Java

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        String s = "Geeksforgeeks";

        // 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: "
                           + scanner.nextLine());

        // print the default radix
        System.out.println("Default Radix value: "
                           + scanner.radix());

        // change the radix of this scanner
        scanner.useRadix(30);

        System.out.println("Radix changed to 30");

        // print the default radix
        System.out.println("Default Radix value: "
                           + scanner.radix());

        // close the scanner
        scanner.close();
    }
}
Output: 
Scanner String: Geeksforgeeks
Default Radix value: 10
Radix changed to 30
Default Radix value: 30
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#radix()
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