[Bluej-discuss] Excercise 4.24

[Marko Bajic]

Thankyou, but i am still having troubles. I write:

public Lot close()
    {
        Iterator it = lots.iterator();
        while(it.hasNext()) {
            Lot lot = (Lot) it.next();
            if(highestBid = null){
          System.out.println(lot.toString() + "unsold");
        }else{System.out.println(lot.toString()+ "sold");

        }
    }

I just get a message that it is uunable to find highestBid. I know I have to 
make it visible from here but I do not know how.

Thankyou,
Marko


>From: Michael Kölling <M.Kolling at kent.ac.uk>
>Reply-To: General discussion for users of BlueJ <bluej-discuss at bluej.org>
>To: General discussion for users of BlueJ <bluej-discuss at bluej.org>
>Subject: Re: [Bluej-discuss] Excercise 4.24
>Date: Sun, 2 Apr 2006 15:08:14 +0100
>
>On 2 Apr 2006, at 9:23, Marko Bajic wrote:
>
> > I was wondering if I could have some help on a particular question.
> >     Exercise 4.24 of Objects with Java Blue-J is giving me
> > problems. Here is
> > my
> >     code so far. I might be miles off for all I know.
> >     public Lot close()
> >         {
> >             Iterator it = lots.iterator();
> >             while(it.hasNext()) {
> >                 Lot lot = (Lot) it.next();
> >                 if ( [I'M NOT SURE WHAT GOES HERE] >1){
> >                 System.out.println(lot.toString()+ "sold");
> >             }else{
> >                 System.out.println(lot.toString() + "unsold");
> >             }
> >         }
> >         }
>
>That's a good start.
>
>The missing if-statement should say something like
>
>if (THERE-WAS-AT-LEAST-ONE-BID) {
>      ...
>}
>
>To test whether there was a bid, you can use the Lot's getHighestBid
>() method. (Have a look at the comment for that method: it says that
>it will return a Bid, or null if there was no bid.)
>
>So you might write something like
>
>if(ATTEMPT TO GET LOT'S HIGHEST BID IS NOT NULL) {
>     ...
>}
>
>Regards,
>
>Michael
>
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