A Bit of Regex

Every time I want to use a regular expression in a Java program, I always seem to go through a lot of iterations developing an expression to get the specific results I need. As a result, this is a small Java program that allows me to use command line arguments to specify text and expressions on the command line.

import java.util.*;
import java.util.regex.*;

public class Regex
{
    public static void main (String [] args) throws Exception
    {
        String source = args[0];
        System.out.println("Source string: " + source);
        Pattern p = Pattern.compile(args[1]);
        System.out.println("Pattern: " + args[1]);
        Matcher m = p.matcher(source);
        System.out.println("match? " + m.matches());
        for (int i=1; i <= m.groupCount(); ++i)
        {
            System.out.println("\tGroup " + i + ":\t" + m.group(i));
        }
    }
}