1108. Defanging an IP Address

class Solution {
    public String defangIPaddr(String address) {
        StringBuilder res=new StringBuilder();
        for(int i=0;i<address.length();i++){
            if(address.charAt(i)=='.'){
                res.append('[');
                res.append('.');
                res.append(']');
            }else{
                res.append(address.charAt(i));
            }
            
        }
        return res.toString();
    }
}