Runner.java

package org.araqne.regex.tester;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Runner {
	public static void main(String[] args) throws IOException {
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		System.out.print("line? ");
		String line = reader.readLine();

		System.out.println("press ctrl-c to break");
		while (true) {
			try {
				System.out.print("regex? ");
				String regex = reader.readLine();
				Pattern p = Pattern.compile(regex);
				Matcher m = p.matcher(line);
				if (m.find()) {
					for (int i = 0; i <= m.groupCount(); i++)
						System.out.println("#" + i + ": " + m.group(i));
				} else {
					System.out.println("no pattern match");
				}
			} catch (Throwable t) {
				t.printStackTrace();
			}
		}
	}
}