JAVA : How to generate OTP

OtpExample.java

package java8s;

import java.util.*;

public class OtpExample {

    

     static char[] show(int len)

    { 

        System.out.print("Your OTP is : ");

 

        String numbers = "0123456789";

 

        Random rd = new Random();

 

        char[] otp = new char[len];

 

        for (int i = 0; i < len; i++)

        {

            

            otp[i] =

             numbers.charAt(rd.nextInt(numbers.length()));

        }

        return otp;

    }

     public static void main(String[] args) {

          

           int length = 5;

        System.out.println(show(length));

     }

}

Output:

Your OTP is : 35838

Thanks & Regards:

Trilochan Tarai

SILAN Technology & java8s.com

+91-9658317757