C:\J21work>javac GiftShop.java
C:\J21work\package\org\cadenhead\ecommerce\Storefront.java:25: cannot find symbo
l
symbol  : method sort(java.util.LinkedList<java.lang.Object>)
location: class java.util.Collections
                Collections.sort(catalog);
                           ^
1 error

package org.cadenhead.ecommerce;

import java.util.*;

public class Item implements Comparable {
    private String id;
    private String name;
    private double retail;
    private int quantity;
    private double price;

    Item(String idIn, String nameIn, String retailIn, String quanIn) {
        id = idIn;
        name = nameIn;
        retail = Double.parseDouble(retailIn);
        quantity = Integer.parseInt(quanIn);

        if (quantity > 400)
            price = retail * .5D;
        else if (quantity > 200)
            price = retail * .6D;
        else
            price = retail * .7D;
        price = Math.floor( price * 100 + .5) / 100;
    }

    public int compareTo(Object obj) {
        Item temp = (Item)obj;
        if (this.price < temp.price)
            return 1;
        else if (this.price > temp.price)
            return -1;
        return 0;
    }

    public String getID() {
        return id;
    }
    
    public String getName() {
        return name;
    }

    public double getRetail() {
        return retail;
    }

    public int getQuantity() {
        return quantity;
    }

    public double getPrice() {
        return price;
    }
}

package org.cadenhead.ecommerce;

import java.util.*;
import org.cadenhead.ecommerce.*;


public class Storefront {
    private LinkedList<Object> catalog = new LinkedList<Object>();

    public void addItem(String id, String name, String price, String quant) {

        Item it = new Item(id, name, price, quant);
        catalog.add(it);
    }

    public Item getItem(int i) {
        return (Item)catalog.get(i);
    }
    
    public int getSize() {
        return catalog.size();
    }

    public void sort() {
        Collections.sort(catalog);
    }
}