Why wouldn't indexOf ArrayList function work?

Question

I can't post EXACT code since it's company information. I will try to replicate it here though so please bare with me.
BEAN:
public class Product {
String name;
String soldDate;
Long id;
// set and get functions for each also
}Product are in a database, the bean above represents what is in the database record.
ArrayList productList = new ArrayList();
// Initialized with Product objects.
// Function deletes a product based on an id
// gets record from database and converts it to a Product object
Product prodToDelete = myDBAccess.get(id);
int index = productList.indexOf(prodToDelete);
productList.remove(index);I get an IndexOutOfBoundsException thrown because the index comes back as -1. I printed out all the values and everything is the same.

Answer 1

"Searches for the first occurence of the given argument, testing for equality using the equals method."
Oh so in Product class I need a function
public boolean equals(Product p){
... // test each attribute?
}