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Program to check valid mobile number using Java regular expressions
You can match a valid mobile number using the following regular expression −
"\d{10}"- A valid mobile number generally have 10 digits (in India).
- The metacharacter "\d" matches the digits from 0 to 9.
- The quantifier ex{n} suggests the repetition of ex n times.
Example 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");
}
}
}Output 1
Enter your name: krishna Enter your Phone number: 9848022338 Given phone number is valid
Output 2
Enter your name: krishna Enter your Phone number: 5465 Given phone number is not valid
Output 3
Enter your name: krishna Enter your Phone number: 984802354655 Given phone number is not valid
Example 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");
}
}
}Output 1
Enter your Phone number: 9848022338 Given phone number is valid
Output 2
Enter your Phone number: 123 Given phone number is not valid
Output 3
Enter your Phone number: 123654788755 Given phone number is not valid
Updated on: 21-Nov-2019
4K+ Views
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