How to compare Objects attributes in an ArrayList?

Question

I am fairly new to Java and I have exhausted all of my current resources to find an answer. I am wondering if it possible to access an Objects first property to see if it ma

Answer 1

You have already got the Product out of the List in the following statement:

System.out.println(products.get(i));

Now, that you have got Product, now to get it's id, you can just call it's getId() method:

if (product.get(i).getId() == productId) {
    // Return this product.
}

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I would also suggest you to use enhanced for-loop instead of the traditional loop like this:

for (Product product: products) {
    // Now you have the product. Just get the Id
    if (product.getId() == productId) {
        return product;
    }
}

Also, you should change the type of productId from Integer to int. You don't need a wrapper type there.