[Bluej-discuss] Excercise 4.24

[Michael Kölling]

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