Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args) {
        // A group of 3 digits followed by 7 digits.
        String regex = "\\b(\\d{3})\\d{7}\\b";

        // Compile the regular expression
        Pattern p = Pattern.compile(regex);

        String source = "12345678, 12345, and 9876543210";

        // Get the Matcher object
        Matcher m = p.matcher(source);

        // Start matching and display the found area codes
        while (m.find()) {
            String phone = m.group();
            String areaCode = m.group(1);
            System.out.println("Phone: " + phone + ", Area  Code:  " + areaCode);
        }
    }
}