具体代码如下:
import java.util.Scanner; public class ContestUsing { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int a; boolean isTrue = true; while (scanner.hasNext()) { String str = scanner.nextLine(); String subString[] = str.split("\\.");//split("分隔符")用于分隔函数,因为"."为转义符,所以要加// if(subString.length!=4) { System.out.println("N"); continue; } for (int i =0;i<4;i++) { if (subString[i].toCharArray().length>1 &&subString[i].charAt(0)=='0') { isTrue = false; break; } try { a = Integer.valueOf(subString[i]); } catch (Exception e) { isTrue = false; break; } if(a<0||a>255) { isTrue = false; break; } } if (isTrue) System.out.println("Y"); else System.out.println("N"); isTrue = true; } } }
0.0分
0 人评分