Accessing Instance Data of Objects within 2D arrays

Question

I currently am working on a simplified inventory program where I have objects called Items (each have a name, rating, and price) that are stored in Item arrays called Rack, and racks are stored in 2d Rack arrays called warehouseRacks. I need to get the price of the all the items and sum them up.

public double totalAssets(){
        double sum = 0.0; 
            for (int i=0; i<warehouseRacks.length; i++){
                for (int j=0; j<warehouseRacks[i].length; j++){
                    Rack racks = warehouseRacks[i][j];
                    Item[] item = racks[i].getItem();
                        sum = sum + thing[j].getPrice();
                    }
                }
            return sum; 
    }

I'm having trouble indexing into all of the arrays to get out actual Item object, so I either get errors like the following, or null pointer exceptions.

I'm currently getting this error: Warehouse.java:57: error: array required, but Rack found Item[] thing = racks[i].getItem();

What am I missing that's keeping it from getting out the Item?

*I'm new to Java and have been working with OOP concepts for a week or so!

As the error implies, `racks[i].getItem()` returns a `Rack` object, that you are trying to assign to a `Item[]` object . — Arnaud, Feb 10 '17 at 16:01
you are reading items : Item[] item = racks[i].getItem(); but you do nothing with it? — JavaSheriff, Feb 10 '17 at 16:08
I think you need additional loop on top of sum+item[j].getPrice() to iterate over item , are you sure this give you back array? racks[i].getItem(); — JavaSheriff, Feb 10 '17 at 17:42
You are at Georgia tech?!?!? let me know if you need private java lessons :) — JavaSheriff, Feb 10 '17 at 19:35

Accessing Instance Data of Objects within 2D arrays

0 Answers0