can arraylist have null values code example

Example: arraylist objects returning null

//in my case my model class had an empty constructor


//don't
public Item(String img_loc, String name, String price) {
       
    }
    
// do
public Item(String img_loc, String name, String price) {
        this.img_loc = img_loc;
        this.name = name;
        this.price = price;
    }