Arrays - confusing, wont compile, please help! ?:-)

Question

Hello everyone,
I am new to the java forum, and I think its a fantastic idea. I am extremely stuck with my java, I have been workin on the same piece of code for at least 20 hours in total, 8 of which I spent in the last day, and to much of my frustration, the buggery code just wont compile. Im assuming many of you are probably laughing at me by now, lol, its ok, After my inital stress and hair pulling, all I could do was laugh. But I refuse to give up on the code after spending so long, and I have a feeling Im so close, its based around arrays, anyway I'll stop blabbering and post the code I have wrote, and if any of you could solve why it wont compile, it would be greatly appreciated.
Heres my code:
import avi.*;
public class CDCollection
private String title = "Unknown";
private String artist = "Unknown";
private int quan = 0;
private double price = 0;
CDCollection(double cdPrice, int cdQuan, String cdTitle, String cdArtist)
title = cdTitle;
artist = cdArtist;
quan = cdQuan;
price = cdPrice;
return price;
public static int findHighest(CDCollection[] cd) {
int highestSoFar = -1; // lower than any valid
for (int i = 0; i < cd.length; i++) {
if (cd.CDCollection() > highestSoFar) {
highestSoFar = cd[i].CDCollection();
return highestSoFar;
// instance method to write out cd details
public void cdDetails(Window screen)
     screen.write("�"+price+"\t"+quan+"\t"+title+"\t"+artist+"\n");
class CDMain
public static void main(String[] args)
     Window screen = new Window ("CDMain", "bold", "black", 14);
screen.showWindow();
     screen.write("CD List:\n\n");
          CDCollection cd1 = new CDCollection (10.99,11,"All Killer No Filler","Sum 41");
     cd1.cdDetails(screen);
CDCollection cd2 = new CDCollection (12.99,8,"The best of","Sting");
     cd2.cdDetails(screen);
Essentially wot Im tryin to do, is create a cd collection program, whereby details of the cd are entered (price, quantity, title and artist) and I would like to return statistical data on the cd collection, such as total number of cds, most expensive and cheapest cds etc. As you can I see I have tried to use arrays to find out the most expensive cd, but it still wont work! Please help, anyone, as Ive exhausted myself on this piece of code, Ive been through books, and I still cant bloody do it. :( lol
Thanks in advance,
All the best,
Larry :-)

Answer 1

Hi!
First you never call your method findHighest.
Second you do not have an array of your CD's. You only have two instances of it.
Try this:
CDCollection[] cds = new CDCollection[2];
CDCollection cd[0] = new CDCollection (10.99,11,"All Killer No Filler","Sum 41");
cds[0].cdDetails(screen);
CDCollection cds[1] = new CDCollection (12.99,8,"The best of","Sting");
cds[1].cdDetails(screen);
int highest = CDCollection.findHighest(cds);
And:
public static int findHighest(CDCollection[] cd) {
double highestSoFar = -1; // lower than any valid
for (int i = 0; i < cd.length; i++) {
if (cd.getPrice() > highestSoFar) {
highestSoFar = cd[i].getPrice();
return highestSoFar;
And in your CDCollection class you need a method:
public double getPrice()
return this.price;
I hope I did no mistake in here but it should work!
Markus