How to write a Java Regex which matches any phone number | Java Regular Expressions | Regex in java

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RegexDemo.java

/**
 * Write a regular expression which matches any phone number
 */

public class RegexDemo
{
    public static void main(String[] args)
    {
        String regex = "\\d\\d\\d([-]){1}\\d\\d\\d([-]){1}\\d\\d\\d\\d";

        String phoneNum1 = "123-332-9999";
        System.out.println(phoneNum1.matches(regex));// true

        String phoneNum2 = "1233329999";
        System.out.println(phoneNum2.matches(regex));// false
    }

}

Output

true
false

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/RegexDemo_phone_number.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/RegexDemo_phone_number

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/ef02c9011c18b0aa670526ba89cc11f493b9b854/BasicJava/RegexDemo_phone_number/?at=master

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