What's wrong here?

//bro use this
package com.codegym.task.task06.task0611;

/*
StringHelper class

*/
import java.lang.String;
public class StringHelper {
    public static String multiply(String s) {
        String result = "";
        //if (s.length() % 5 == 0) {
            result = s.substring(0,s.length());

        //}
        //return result;
return result + result + result + result + result;    }

    public static String multiply(String s, int count) {
        String result = "";
        for (int i = 0; i < count; i++) {
            result += s;
        }
        return result;
    }

    public static void main(String[] args) {
        StringHelper.multiply("GrigoreTurcan");
    }
}