Java正規表現を使用して有効な携帯電話番号をチェックするプログラム

次の正規表現を使用して、有効な携帯電話番号を照合できます-

"\\d{10}"

• 有効な携帯電話番号は通常10桁です（インド）。
• メタ文字" \ d "は0から9までの数字に一致します。
• 数量詞ex{n}は、exn回の繰り返しを示します。

例1

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class PhoneNumberExample {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter your name: ");
      String name = sc.nextLine();
      System.out.println("Enter your Phone number: ");
      String phone = sc.next();
      //Regular expression to accept valid phone number
      String regex = "\\d{10}";
      //Creating a pattern object
      Pattern pattern = Pattern.compile(regex);
      //Creating a Matcher object
      Matcher matcher = pattern.matcher(phone);
      //Verifying whether given phone number is valid
      if(matcher.matches()) {
         System.out.println("Given phone number is valid");
      } else { 
         System.out.println("Given phone number is not valid");
      }
   }
}

出力1

Enter your name:
krishna
Enter your Phone number:
9848022338
Given phone number is valid

出力2

Enter your name:
krishna
Enter your Phone number:
5465
Given phone number is not valid

出力3

Enter your name:
krishna
Enter your Phone number:
984802354655
Given phone number is not valid

例2

import java.util.Scanner;
public class Test {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter your Phone number: ");
      String phone = sc.next();
      //Regular expression to accept valid phone number
      String regex = "\\d{10}";
      //Matching the given phone number with regular expression
      boolean result = phone.matches(regex);
      if(result) {
         System.out.println("Given phone number is valid");
      } else {
         System.out.println("Given phone number is not valid");
      }
   }
}

出力1

Enter your Phone number:
9848022338
Given phone number is valid

出力2

Enter your Phone number:
123
Given phone number is not valid

出力3

Enter your Phone number:
123654788755
Given phone number is not valid