Help with HashMap - what am I doing wrong?!?!

Question

I'm hoping to create multiple instances of an object and identify each one differently. On an earlier thread, someone recommended I use a hashmap to do this. I'm trying but failing. The following code is intended to allow me to ask for 1 and get apple and ask for 2 and get banana. Instead, when I ask for either I get banana, which is making me think that I'm just rewriting over my object and putting two of the same instances in the hashmap.
Thanks in advance!
import java.util.HashMap;
import java.util.Map;
public class HashMapTest {
     private static Map <Integer, Bids> map;
     public static void main (String[] args) {
          Map map = new HashMap<Integer, Bids>();
          Bids myBids = new Bids("apple", 1.5, 1);
          map.put(1, myBids);
          myBids = new Bids("banana", 2.0, 2);
          map.put(2, myBids);
          Bids aBids = (Bids) map.get(1);
          String cat = aBids.getProductCategory();
          System.out.println(cat);
Bids code:
public class Bids {
     static String productCategory;
     private static Double price;
     private static int id;
     public Bids(String myProductCategory, Double myPrice, int myId) {
          productCategory = myProductCategory;
          price = myPrice;
          id = myId;
     public String getProductCategory(){
          return productCategory;
     public Double getPrice(){
          return price;
     public int getId(){
          return id;
}

Answer 1

jverd wrote:
You have to override equals() and hashCode() in your Bids class.I'm not questioning the desirability of that, but is it mandatory? This works fine, without overriding either.import java.util.HashMap;
import java.util.Map;
public class HashMapTest {
  public static void main(String[] args) {
    Map<Integer, Bids> map = new HashMap<Integer, Bids>();
    Bids myBids = new Bids("apple", 1.5, 1);
    map.put(1, myBids);
    myBids = new Bids("banana", 2.0, 2);
    map.put(2, myBids);
    Bids aBids = map.get(1);
    System.out.println("1: " + aBids.getProductCategory());
    aBids = map.get(2);
    System.out.println("2: " + aBids.getProductCategory());
class Bids {
  private String productCategory;
  public Bids(String myProductCategory, Double myPrice, int myId) {
    productCategory = myProductCategory;
    price = myPrice;
    id = myId;
  public String getProductCategory() {
    return productCategory;
}db
Edited by: DarrylBurke - I hate a laptop keyboard!