Java Scanner useRadix() Method

The useRadix() method of Java Scanner class is used to set the default radix of the Scanner which is in using to the specified radix.

Syntax

Following is the declaration of useRadix() method:

Parameter

DataType	Parameter	Description	Required/Optional
int	radix	It is used by the scanner object to override the default radix.	Required

Returns

The useRadix() method reurns this Scanner object.

Exceptions

IllegalArgumentException- It will thrown exception if the radix is out of range.

Compatibility Version

Java 1.5 and above

Example 1

import java.util.*;  
public class ScannerUseRadixExample1 {  
     public static void main(String args[]) {   	 
    	 String userInput = "1 2 3 4";
    	 Scanner scanner = new Scanner(userInput);
    	 //Change the radix of the scanner
    	 scanner.useRadix(10);
    	 while (scanner.hasNextInt()) {  		 
    	     int i = scanner.nextInt();
    	     System.out.println(i);   	     
    	     }
    	 scanner.close();
       }  
} 

Output:

Example 2

import java.util.*;  
public class ScannerUseRadixExample2 {  
     public static void main(String args[]) {   	 
         Scanner scan = new Scanner("Facebook.com 11 + 11 = 22.0 true ");
         System.out.println("String: "+scan.nextLine());
         //Change the radix of the scanner
         scan.useRadix(32);
         //Display the new radix
         System.out.println("New radix: "+scan.radix());
         scan.close();
         }  
} 

Output:

String: Facebook.com 11 + 11 = 22.0 true 
New radix: 32

Example 3

import java.util.Scanner;  
public class ScannerUseRadixExample3 { 	
    public static void main(String args[]){ 
	   //Initialize Scanner object
	   Scanner scan = new Scanner("22 45 200 150");
	   System.out.println("If the Radix is less than Character.MIN_RADIX or greater than Character.MAX_RADIX, then an IllegalArgumentException will be thrown.");
	   //Print useRadix used by Scanner object
	   System.out.println("Found New Radix: "+scan.useRadix(235));
	   scan.close();
         }  
}   

Output:

If the Radix is less than Character.MIN_RADIX or greater than Character.MAX_RADIX, then an IllegalArgumentException will be thrown.
Exception in thread "main" 
java.lang.IllegalArgumentException: radix:235
	at java.base/java.util.Scanner.useRadix(Scanner.java:1353)
	at myPackage.ScannerUseRadixExample3.main(ScannerUseRadixExample3.java:9)

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