Full Code of First Index of String in Infinite String

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package newcodewarsgen;

import java.math.BigInteger;
import java.util.stream.Collectors;
import java.util.stream.LongStream;

/**
 *
 * @author Dazai Osamu
 */
public class PositionOfDigitalStringMySolution {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
//        try {
//            BufferedWriter out = new BufferedWriter(new FileWriter("numberfuck.txt"));
//            out.write(generateNum("53635"));  //Replace with the string
//                                                     //you are trying to write
//            out.close();
//        }
//        catch (IOException e)
//        {
//            System.out.println("Exception "+e);
//
//        }
        System.out.println(findPosition("229"));

//        System.out.println(BigInteger.valueOf(187).xor(BigInteger.valueOf(991)));
//        System.out.println(BigInteger.valueOf(6).xor(BigInteger.valueOf(4)));
    }
//    public static String generateNum(String s){
//        while(!num.contains(s)){
//            num+=start.toString();
//            start= start.add(BigInteger.ONE);
//        }
//        return num;
//    }
    public static long findPosition(final String s) {
        BigInteger start = new BigInteger("13");
        String num = "123456789101112";
        Long index = 0L;
        System.out.println("The Num: "+s);
        if(!num.contains(s)){
            if (Long.valueOf(s).compareTo(Long.valueOf("12345678913"))>=0) {
                num = "12345678913";
                index=generateIndex(num);
                return index+((Long.valueOf(s)-Long.valueOf(num))*num.length());
            }else if(Long.valueOf(s).compareTo(Long.valueOf("1234567892"))>=0){
                num = "1234567892";
                index=generateIndex(num);
                return index+((Long.valueOf(s)-Long.valueOf(num))*num.length());
            }else if(Long.valueOf(s).compareTo(Long.valueOf("123456790"))>=0){
                num = "123456790";
                index=generateIndex(num);
                return index+((Long.valueOf(s)-Long.valueOf(num))*num.length());
            }
        }
        while(!num.contains(s)){
//            System.out.println("Num: "+num);
            num +=start.toString();
            start = start.add(BigInteger.ONE);
        }
        return num.indexOf(s)+index;
    }
    public static Long generateIndex(String num){
        return Long.parseLong(LongStream.generate(()->9).limit(num.length()).mapToObj(String::valueOf).collect(Collectors.joining("")));
    }
    public static BigInteger newStart(String num){
        return new BigInteger(num).add(BigInteger.ONE);
    }
}