leetcode 1108. 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"
class Solution {
public String defangIPaddr(String address) {
StringBuilder re = new StringBuilder();
for(int i = 0; i< address.length(); i++){
char a = address.charAt(i);
if(a == '.') re.append("[.]");
else re.append(a);
}
return re.toString();
}
}
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