Cannot find symbol symbol: method remove(int) location: variable s of type java.lang.String.

Question about the task

Under discussion

Hi, guys! I make a mistake. It's something about method remove, I think. cannot find symbol symbol: method remove(int) location: variable s of type java.lang.String. Please clarify me. Thank you in advance!

package com.codegym.task.task07.task0716;

import java.util.ArrayList;

/*
R or L

*/

public class Solution {
    public static void main(String[] args) throws Exception {
        ArrayList<String> list = new ArrayList<String>();
        list.add("rose"); // 0
        list.add("love"); // 1
        list.add("lyre"); // 2
        list = fix(list);

        for (String s : list) {
            System.out.println(s);
        }
    }

    public static ArrayList<String> fix(ArrayList<String> list) {
        // write your code here
        for (int i = 0; i < list.size();) {
            String s = list.get(i);

            if (s.contains("r") && s.contains("l"))
                i++;
            else if (s.contains("r"))
                s.remove(i);
            else if (s.contains("l")) {
                s.add(i, s);
                i += 2;
            }
        }
        return list;
    }
}

1. Create a list of words and populate it yourself.
2. The fix method should:
2.1. remove all words containing the letter "r" from the list
2.2. duplicate all words containing the letter "l".
2.3. if a word contains both "r" and "l", then leave it unchanged.
2.4. don't do anything to other words.

For example:
rose lyre love

Output:
lyre love love

Requirements:

The program must not read data from the keyboard.
The fix method should remove all words containing the letter "r" from the list. There is an exception: words containing both "r" and "l" should be left alone.
The fix method must duplicate words containing the letter "l" (add another instance of this word to the list). There is an exception: words containing both "l" and "r" should not be duplicated.
The fix method should not do anything with words that contain both "l" and "r".
The fix method should not do anything with words that don't contain either "l" or "r".

package com.codegym.task.task07.task0716; import java.util.ArrayList; /* R or L */ public class Solution { public static void main(String[] args) throws Exception { ArrayList<String> list = new ArrayList<String>(); list.add("rose"); // 0 list.add("love"); // 1 list.add("lyre"); // 2 list = fix(list); for (String s : list) { System.out.println(s); } } public static ArrayList<String> fix(ArrayList<String> list) { // write your code here for (int i = 0; i < list.size();) { String s = list.get(i); if (s.contains("r") && s.contains("l")) i++; else if (s.contains("r")) s.remove(i); else if (s.contains("l")) { s.add(i, s); i += 2; } } return list; } }