Lottery.java

package jug.da.lottery;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Lottery {

  public static void main(String[] args) {
		Lottery lottery = new Lottery();
		lottery.start();
	}

	public void start() {
		List<String> participants = getParticipants();
		System.out.println("Participant count: " + participants.size());

		Random r = new Random();
		int idx = r.nextInt(participants.size());

		System.out.println("Winner: " + participants.get(idx));
	}

	private List<String> getParticipants() {
		List<String> p = new ArrayList<String>();
		try {
			@SuppressWarnings("resource")
			BufferedReader in = new BufferedReader(new FileReader(
					"c:\\temp\\participants.txt"));
			String line = "";
			while ((line = in.readLine()) != null) {
				p.add(line);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return p;
	}

}

Ok, ein GitHub-Projekt wäre übertrieben gewesen... :-)