合法IP

import java.util.Scanner;public class CheckLegalIp {public static void main(String[] args) {Scanner scan = new Scanner(System.in);String ipAdr = scan.nextLine();String[] ipArr = ipAdr.split("\\.");int count = 0;if(ipArr.length==4){for (int i = 0; i < ipArr.length; i++) {int a = Integer.parseInt(ipArr[i]);if(a > 255);elsecount++;}if(count==4)System.out.println("YES");elseSystem.out.println("NO");}elseSystem.out.println("NO");}}

注意：分隔字符串要加\\