what is wrong with this code?

import java.util.*;

public class Main {

List fizzBuzzList = new ArrayList<>(100);

public void fizzBuzzIterator(){

for (int i = 1 ; i < 100; i++) {

if (((i % 3) == 0) && ((i % 5) == 0)) {

fizzBuzzList.set(i, "FizzBuzz");

}

else if ((i % 3) == 0) {

fizzBuzzList.set(i, "Fizz");

}

else if ((i % 5) == 0) {

fizzBuzzList.set(i, "Buzz");

}

else {

fizzBuzzList.set(i);

}

}

public void toString(){

return fizzBuzzList.get(i);

}

for(int i = 0; i < fizzBuzzList.size();i++){

System.out.println(fizzBuzzList.get(i).toString());

}

}

}