# Java Examples - Matching Phone Numbers

## Problem Description

How to match phone numbers in a list?

## Solution

Following example shows how to match phone numbers in a list to a particle 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}
```

The following is an example to verify phone number.

```public class Main {
private static boolean isValid(String s) {
String regex = "\\d{2}-\\d{4}-\\d{6}";
return s.matches(regex);
}
public static void main(String[] args) {
System.out.println(isValid("91-9652-018244"));
}
}
```

The above code sample will produce the following result.

```true
```
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