Day_52_JavaRegex_HackerRank.java

package com.TrX;

import java.util.regex.Pattern;
import java.util.Scanner;

class Day_52_JavaRegex_HackerRank {

    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            String IP = in.next();
            System.out.println(IP.matches(new MyRegex().pattern));
        }

    }
}

//Write your code here
class MyRegex{
    public static String zeroTo255 = "(\\d{1,2}|(0|1)\\" + "d{2}|2[0-4]\\d|25[0-5])";
    public static String pattern = zeroTo255 + "\\."+ zeroTo255 + "\\." + zeroTo255 + "\\." + zeroTo255;

    Pattern p = Pattern.compile(pattern);

}