Java Examples - Matching Phone Numbers

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Problem Description:

How to match phone numbers in a list?

Solution:

Following example shows how to match phone numbers in a list to a perticlar pattern by using phone.matches(phoneNumberPattern) method .

public class MatchPhoneNumber {
   public static void main(String args[]) {
      isPhoneValid("1-999-585-4009");
      isPhoneValid("999-585-4009");
      isPhoneValid("1-585-4009");
      isPhoneValid("585-4009");
      isPhoneValid("1.999-585-4009");
      isPhoneValid("999 585-4009");
      isPhoneValid("1 585 4009");
      isPhoneValid("111-Java2s");
   }
   public static boolean isPhoneValid(String phone) {
      boolean retval = false;
      String phoneNumberPattern = 
      "(\\d-)?(\\d{3}-)?\\d{3}-\\d{4}";
      retval = phone.matches(phoneNumberPattern);
      String msg = "NO MATCH: pattern:" + phone
      + "\r\n regex: " + phoneNumberPattern;
      if (retval) {
         msg = " MATCH: pattern:" + phone 
         + "\r\n regex: " + phoneNumberPattern;
      }
      System.out.println(msg + "\r\n");
      return retval;
   }
}

Result:

The above code sample will produce the following result.

MATCH: pattern:1-999-585-4009
	    regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}
MATCH: pattern:999-585-4009
	    regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}
MATCH: pattern:1-585-4009
	    regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}
NOMATCH: pattern:1.999-585-4009
 regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}
NOMATCH: pattern:999 585-4009
 regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}
NOMATCH: pattern:1 585 4009
 regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}
NOMATCH: pattern:111-Java2s
 regex: (\\d-)?(\\d{3}-)?\\d{3}-\\d{4}


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