[Leetcode] Shuffle String(JAVA)

class Solution {
    public String restoreString(String s, int[] indices) {
        char[] chr = s.toCharArray();
        StringBuffer sb = new StringBuffer(); 
        for(int i=0; i < indices.length; i++){
            for(int j =0; j < indices.length; j++){
                if(i == indices[j]){
                    System.out.println(chr[j]);
                    sb.append(chr[j]);
                }
            }
        }
        return sb.toString();
    }
}