in creating a JSF my java class with a method to generate random numbers is not working

in creating a JSF my java class with a method to generate random numbers is not working

    package com.token;

``import java.util.Random;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;


@ManagedBean
@SessionScoped 
public class cToken {

    private String TokenValue; 

    public String getTokenValue() {
        return TokenValue;
    }

    public void setTokenValue(String TokenValue) {
        this.TokenValue = TokenValue;
    }

    public  String  myRand(){
       String displayThis = null;
       //note a single Random object is reused here
       Random randomGenerator = new Random();
       for (int idx = 1; idx <= 10; ++idx){
       int randomInt = randomGenerator.nextInt(100);
       displayThis = "" + randomInt;
       }      

    return displayThis;
    }

}

This code is what is writren in the java class file cToken for the jsf application that i was writing Kindly look into this and assist me in finding out this code does not wrk