Defanging an IP Address

没啥解释的.

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