CODEWITHSUNDEEP
javaarraylist
Shiroi Tamashi
Shiroi Tamashi

Reputation: 41

How To move Items Between ArrayLists? Java

Im making a game,an rpg (yeah again another dude trying to make one of those), and I've managed to make most of it except the inventory and how it behaves with the rest of the world, right now I want to move items between lists in a logic way, for example I kill a monster, the monster drops a tomato, Tomato() will be created inside the ArrayList worldInventory, and drawn at x,y, if the player walks by the tomato, that tomato should be moved into ArrayList Inventory, if the player desires to equip the tomato, the tomato should be moved into the ArrayList equipped.

So to make things more understandable I have 3 lists:

 ArrayList<Item> worldInventory
 ArrayList<Item> Inventory
 ArrayList<Item> equipped.

I want to move copies of Tomato() between them, and If a Tomato() has its values changed inside a list and it's moved I want that Tomato() to retain its values.

;D I'll give a big sized internet choco-cookie for whoever helps me out, much appreciated. Thanks n.n

Upvotes: 1

Views: 973

Answers (3)

Michał Szydłowski
Michał Szydłowski

Reputation: 3409

If you add an object to a list, it will retain all its field values. Just:

Tomato yourTomatoObject = otherList.remove(index);
inventory.add(yourTomatoObject);

Upvotes: 0

brso05
brso05

Reputation: 13222

You can do like this:

public static void main(String[] args) {
    ArrayList<String> test = new ArrayList<String>();
    ArrayList<String> test1 = new ArrayList<String>();
    test.add("test");
    test1.add(test.get(0));
    test.remove(0);
    System.out.println("" + test.size());
    System.out.println("" + test1.get(0));
}

You can add it to the one arraylist and remove it from the other.

Upvotes: 0

WeMakeSoftware
WeMakeSoftware

Reputation: 9162

on item drop:

Tomato tomato = new Tomato();
worldInventory.add(tomato);

on pickup:

worldInventory.remove(tomato);
inventory.add(tomato);

on equip:

inventory.remove(tomato);
equipped.add(tomato);

Just wondering why do you need equipped ArrayList ?

you can have a boolean flag inside your WorldObject ( boolean equipped = false) and just set it to true, when the item is equipped.

Upvotes: 1

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