代码展示 判断号码是否正确

import java.util.*;

public class njava08{

  public static void main(String[]args){

    Scanner in = new Scanner(System.in);

    String text = in.next();

    String regex = "1\\d{10}";

    if(text.matches(regex)){

      System.out.println("It is a correct phone number");

    }else{

      System.out.println("It is not a correct phone number");

    }

  }

}