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Java-Regex.java

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import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.Scanner;

class Solution{

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{

String pattern = "([0][0][0]|([0][0]|)[\\d]|([0]|)[\\d][\\d]|[1][\\d][\\d]|[2][0-4][\\d]|[2][5][0-5])."+"([0][0][0]|([0][0]|)[\\d]|([0]|)[\\d][\\d]|[1][\\d][\\d]|[2][0-4][\\d]|[2][5][0-5])."+"([0][0][0]|([0][0]|)[\\d]|([0]|)[\\d][\\d]|[1][\\d][\\d]|[2][0-4][\\d]|[2][5][0-5])."+"([0][0][0]|([0][0]|)[\\d]|([0]|)[\\d][\\d]|[1][\\d][\\d]|[2][0-4][\\d]|[2][5][0-5])";

}