IP 를 엄격하게 구분 하 는 정규 표현 식

package com.autonavi.regex;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class TestRegex {
	public static boolean isIP(String ip) {
		String ipRegex = "(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9][0-9]|[0-9])";
		Pattern pattern = Pattern.compile(ipRegex);
		Matcher matcher = pattern.matcher(ip);
		return matcher.matches();
	}

	public static void main(String[] args) {
		//true,  ,  true
		String ip1 = "192.168.1.1";
		if(isIP(ip1)) {
			System.out.println("IP1  ！");
		} else {
			System.out.println("IP1  ！");
		}
		
		//true，  ,  true
		String ip2 = "255.255.255.255";
		if(isIP(ip2)) {
			System.out.println("IP2  ！");
		} else {
			System.out.println("IP2  ！");
		}
		
		//false，  ,  false
		String ip3 = "256.168.1.1";
		if(isIP(ip3)) {
			System.out.println("IP3  ！");
		} else {
			System.out.println("IP3  ！");
		}
		
		//true，  ,  true
		String ip4 = "0.168.1.1";
		if(isIP(ip4)) {
			System.out.println("IP4  ！");
		} else {
			System.out.println("IP4  ！");
		}
		
		//true,  ,  false
		String ip5 = "00.168.1.1";
		if(isIP(ip5)) {
			System.out.println("IP5  ！");
		} else {
			System.out.println("IP5  ！");
		}
		
		//false,  ,  false
		String ip6 = "000.168.1.1";
		if(isIP(ip6)) {
			System.out.println("IP6  ！");
		} else {
			System.out.println("IP6  ！");
		}
		
		//true，  ,  false
		String ip7 = "01.100.100.100";
		if(isIP(ip7)) {
			System.out.println("IP7  ！");
		} else {
			System.out.println("IP7  ！");
		}
		
		//false,  ,,  false
		String ip8 = "001.100.100.100";
		if(isIP(ip8)) {
			System.out.println("IP8  ！");
		} else {
			System.out.println("IP8  ！");
		}
		
		//false,  ,  false
		String ip9 = "010.100.100.100";
		if(isIP(ip9)) {
			System.out.println("IP9  ！");
		} else {
			System.out.println("IP9  ！");
		}
		
		//false,  ,  false
		String ip10 = "-10.100.100.100";
		if(isIP(ip10)) {
			System.out.println("IP10  ！");
		} else {
			System.out.println("IP10  ！");
		}
		
	}
}

IP1  ！
IP2  ！
IP3  ！
IP4  ！
IP5  ！
IP6  ！
IP7  ！
IP8  ！
IP9  ！
IP10  ！