Shuffle String

class Solution {
    public String restoreString(String s, int[] indices) {
        Map<Integer, Character> map = new HashMap<>();
        for(int i = 0; i<indices.length; i++){
            map.put(indices[i], s.charAt(i));
        }
        String res = "";
        for(int i = 0; i<indices.length; i++){
            res += map.get(i)+"";
        }
        return res;
    }
}