package bingo.game;import java.util.*;import bingo.shared.*;class RandomBag implements BagOfBalls {    private boolean DEBUG = false;    private Vector balls = new Vector(BingoBall.MAX);    private Random generator = new Random(System.currentTimeMillis());    RandomBag () {	for (int j = BingoBall.MIN; j <= BingoBall.MAX; j++)	    balls.addElement(new BingoBall(j));    }    // PENDING: the compiler wanted this public...why?    public BingoBall getNext() throws NoMoreBallsException {	if (balls.size() > 0) {	    int num = (int)(generator.nextDouble() * balls.size());	    BingoBall returnThis = (BingoBall)balls.elementAt(num);	    balls.removeElementAt(num);	    return returnThis;	} else {	    throw new NoMoreBallsException();	}    }}