Java Scanner reset() Method

The reset() method of Java Scanner class is used to reset the Scanner which are in using. The resetting of scanner discards all of its explicit state information.

Syntax

Following is the declaration of reset() method:

Parameter

This method does not accept any parameter.

Returns

The reset() method reurns the Scanner which are in using.

Exceptions

Compatibility Version

Java 1.6 and above

Example 1

import java.io.*;
import java.util.*;  
public class ScannerResetExample1 { 	
    public static void main(String args[]) throws IOException{ 
    	  String data = "This is a\nJavaTpoint";   	 
        StringReader in = new StringReader(data);        
        Scanner scanner = new Scanner(in);
        int counter = 1;
        scanner.next();
        in.reset();
        while(scanner.hasNext()) {
            System.out.printf("%d: %s%n", counter++, scanner.next());
        }
        scanner.close();
   }  
}   

Output:

1: is
2: a
3: JavaTpointThis
4: is
5: a
6: JavaTpoint

Example 2

import java.util.*;  
public class ScannerResetExample2 { 	
    public static void main(String args[]){ 
    	  String str = "Hello Java 10 + 10 = 20.0 false ";
        Scanner scan  = new Scanner(str);
        System.out.println(scan.nextLine());
        //Change the locale of this scanner
        scan.useLocale(Locale.US);
        //Change the radix of this scanner
        scan.useRadix(30);
        //Reset and check the values for radix and locale
        scan.reset();
        System.out.println("Default Radix: "+scan.radix());
        System.out.println(scan.locale());
        scan.close();
        }  
}   

Output:

Hello Java 10 + 10 = 20.0 false 
Default Radix: 10
en_IN

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