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Thread: Gamelogic - variable in another class

  1. #1
    Junior Member
    Join Date
    Dec 2013
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    Default Gamelogic - variable in another class

    Hello everyone, I'm still kind of new to programming and I need some help on a project I just started..

    How it works:
    The 'game' class has three objects: inventory, items and miner
    Inventory has 20 slot objects and items has an arraylist which contains item objects
    gamelogic.png

    Now..
    I want the miner object to be able to check the amount of slots which are free in the inventory, but I'm not sure about how to do this
    Should I pass the inventory object to each new miner object I create? Or is there another way to do this?
    Right now the only arguments which are given to a new miner object are the rock it should mine and the amount of ores it has to mine, for example:
    Miner miner = new Miner(Ore.COAL, 20); would mine 20 coal ores.

    LONG STORY SHORT:
    I need the best way to let the miner object get the 'slotsOccupied' variable from the inventory object

    What I have so far:

    Game
    public class Game {
     
        private Items items;
        private Inventory inventory;
     
        public Game() {
            items = new Items();
            for (Rock rock : Rock.values())
                items.addItem(rock.toString(), rock.toString() + " ore", rock.getPrice());
            items.addItem("Pickaxe", "It's a pickaxe", 1000);
     
            inventory = new Inventory();
     
            mineStuff();
     
        }
     
        public void mineStuff() {
            Miner miner = new Miner(Rock.TIN, 20);
        }
     
    }

    Items
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
     
    public class Items {
     
        List<Item> items = new ArrayList<Item>();
     
        public void addItem(String name, String description, int price) {
            items.add(new Item(items.size(), name, description, price));
        }
     
        public void deleteItem(int itemID) {
            items.remove(itemID);
        }
     
        public int getItemID(String name) {
            Iterator<Item> it = items.iterator();
            while (it.hasNext()) {
                Item item = it.next();
                if (item.getName().equalsIgnoreCase(name))
                    return item.getItemID();
            }
            return -1;
        }
     
        public String getItemName(int itemID) {
            return items.get(itemID).getName();
        }
     
        public String getItemDescription(int itemID) {
            return items.get(itemID).getDescription();
        }
     
        public int getItemPrice(int itemID) {
            return items.get(itemID).getPrice();
        }
     
    }

    Item
    public class Item {
     
        private int itemID;
        private String name;
        private String description;
        private int price;
     
        public Item(int itemID, String name, String description, int price) {
            this.itemID = itemID;
            this.name = name;
            this.description = description;
            this.price = price;
        }
     
        public int getItemID() {
            return itemID;
        }
     
        public String getName() {
            return name;
        }
     
        public String getDescription() {
            return description;
        }
     
        public int getPrice() {
            return price;
        }
     
    }

    Inventory
    public class Inventory {
     
        public static final int MAX_SLOTS = 20;
        private int slotsOccupied = 0;
        private Slot[] inventory = new Slot[MAX_SLOTS];
     
        public boolean put(Item item, int amount) {
            if (slotsOccupied < MAX_SLOTS) {
                inventory[slotsOccupied++] = new Slot(item, amount);
                return true;
            } else {
                return false;
            }
        }
     
        public Item getItem(int slot) {
            return inventory[slot].getItem();
        }
     
        public int getSlotsOccupied() {
            return slotsOccupied;
        }
     
        @Override
        public String toString() {
            StringBuilder s = new StringBuilder();
            for (int i = 0; i < inventory.length; i++)
                s.append(inventory[i].getItem().getName() + " x " + inventory[i].getAmount() + "\n");
            return s.toString();
        }
    }

    Slot
    public class Slot {
     
        private Item item;
        private int amount;
     
        public Slot(Item item, int amount) {
            this.item = item;
            this.amount = amount;
        }
     
        public void setAmount(int amount) {
            this.amount = amount;
        }
     
        public void setItem(Item item) {
            this.item = item;
        }
     
        public int getAmount() {
            return amount;
        }
     
        public Item getItem() {
            return item;
        }
    }

    Rock
    enum Rock {
     
        TIN(1, 10),
        COPPER(1, 10),
        IRON(5, 15),
        COAL(30, 25),
        MITHRIL(45, 80),
        ADAMANT(60, 120),
        RUNE(85, 200);
     
        private int requiredLevel;
        private int price;
     
        private Rock(int requiredLevel, int price) {
            this.requiredLevel = requiredLevel;
            this.price = price;
        }
     
        public int getRequiredLevel() {
            return requiredLevel;
        }
     
        public int getPrice() {
            return price;
        }
     
        @Override
        public String toString() {
            return name().toLowerCase();
        }
    }

    Miner
    public class Miner {
     
        private Rock rock;
        private int amount;
     
        public Miner(Rock rock, int amount) {
            if (amount < Inventory.MAX_SLOTS) { //here I need the slotsOccupied for!
                this.rock = rock;
                this.amount = amount;
            }
        }
     
       /* public void start() {
            try {
     
            } catch (InterruptedException ex) {
                System.out.println(ex.getMessage());
            }
        } */
     
    }

    If you have any questions, please ask!

    Thank you for your time (:


  2. #2
    Junior Member
    Join Date
    Dec 2013
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    Default Re: Gamelogic - variable in another class

    I solved it myself, I hope it's a good way.. :p

    Miner
    public class Miner {
     
        private Inventory inventory;
        private Items items;
     
        public Miner(Inventory inventory, Items items) {
            this.inventory = inventory;
            this.items = items;
        }
     
        public boolean mine(Rock rock, int amount) {
            if (inventory.getSlotsOccupied() + amount > inventory.MAX_SLOTS)
                return false;
            startMining(rock, amount);
            return true;
        }
     
        public void startMining(Rock rock, int amount) {
            try {
                for (int i = 0; i < amount; i++) {
                    Thread.sleep(1000);
                    inventory.put(items.getItem(items.getItemID(rock.toString())), amount);
                }
            } catch (InterruptedException ex) {
                System.out.println(ex.getMessage());
            }
        }
     
    }

    Game
    public class Game {
     
        private Items items;
        private Inventory inventory;
        private Miner miner;
     
        public Game() {
            items = new Items();
            for (Rock rock : Rock.values())
                items.addItem(rock.toString(), rock.toString() + " ore", rock.getPrice());
            items.addItem("Pickaxe", "It's a pickaxe", 1000);
     
            inventory = new Inventory();
     
            Miner miner = new Miner(inventory, items);
     
            mineStuff();
     
        }
     
        public void mineStuff() {
            miner.startMining(Rock.TIN, 15);
            miner.startMining(Rock.RUNE, 2);
            miner.startMining(Rock.COAL, 2);
        }
     
    }

    Items
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
     
    public class Items {
     
        List<Item> items = new ArrayList<Item>();
     
        public void addItem(String name, String description, int price) {
            items.add(new Item(items.size(), name, description, price));
        }
     
        public void deleteItem(int itemID) {
            items.remove(itemID);
        }
     
        public int getItemID(String name) {
            Iterator<Item> it = items.iterator();
            while (it.hasNext()) {
                Item item = it.next();
                if (item.getName().equalsIgnoreCase(name))
                    return item.getItemID();
            }
            return -1;
        }
     
        public String getItemName(int itemID) {
            return items.get(itemID).getName();
        }
     
        public String getItemDescription(int itemID) {
            return items.get(itemID).getDescription();
        }
     
        public int getItemPrice(int itemID) {
            return items.get(itemID).getPrice();
        }
     
        public Item getItem(int itemID) {
            return items.get(itemID);
        }
     
    }

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