"how to compare objects attributes in an arraylist?" Code Answer

you have already got the product out of the list<product> 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.
}

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.

By Alak on October 13 2022

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