在代码内创建对象并添加到arrayJ，BlueJ

Question

I am wanting to have objects already created in the code so I don't have to construct each object but I don't know how to add them to an array List, this is what I have so far:

public class MenuItem
{    
    private String foodName;
    private String foodType;
    private float price;
    private int calories;    


    public MenuItem(String nameFood, String typeFood, float foodPrice, int caloryCount)

    {     
    foodName = nameFood;
    foodType = typeFood;
    price = foodPrice;
    calories = caloryCount;

   } 

I had this set up but I am going to change it so I have a class with all the different menu sorts already added in so then all I have to do is add them to an Array List but I am not sure how to do this, just showing you this so you can have an idea of what I was planning on adding to the Array List.

Answer 1

Do you mean a static List like this?

public class Main {

    public static final List<MenuItem> items;

    static {
        items = new LinkedList<>();
        items.add(new MenuItem("Steak", "Meat", 13.50f, 378));
        items.add(new MenuItem("Bread", "Grain", 2.50f, 79));
        items.add(new MenuItem("Rice", "Grain", 4.50f, 206));
    }
}

Answer 2

If you are asking about how to create an ArrayList for your MenuItem class:

AraryList<MenuItem> list = new ArrayList<MenuList>();

To add MenuItem objects to your list:

list.add(new MenuItem(foodName, foodType, price, calories));

If you want to create sub-classing for your MenuItem:

class MenuItem
{
    //your class implementation
}

class SubMenuItem extends MenuItem
{
    //your class implementation    
}

ArrayList<MenuItem> list = new ArrayList<MenuItem>();
list.add(new MenuItem(foodName, foodType, price, calories));
list.add(new SubMenuItem( /*your arguments*/ ));