leetcode-1108-easy

Defanging an IP Address

Given a valid (IPv4) IP address, return a defanged version of that IP address.

A defanged IP address replaces every period "." with "[.]".

Example 1:

Input: address = "1.1.1.1"
Output: "1[.]1[.]1[.]1"
Example 2:

Input: address = "255.100.50.0"
Output: "255[.]100[.]50[.]0"
Constraints:

The given address is a valid IPv4 address.

思路一：直接使用替换，更高效的方法可以是用字符操作

    public String defangIPaddr(String address) {
        return address.replaceAll("\\.", "[.]");
    }