Inventory.java

package org.uob.a1;

public class Inventory {

    //Declaring attributes
    private String contents[];
    final int MAX_ITEMS = 10;

    //Constructor method
    public Inventory()
    {
        this.contents = new String[MAX_ITEMS];
        for (int i = 0; i < MAX_ITEMS; i++)
        {
            contents[i] = "empty";
        }
    }

    //Method to add an item to the player's inventory
    public void addItem(String Item)
    {   
        //Declaring variable outside of for loop
        int location = (-1);
        //For loop to check the empty space for the next empty space in the array
        for (int i = 0; i < MAX_ITEMS; i++)
        {
            if (this.contents[i] == "empty")
            {
                location = i;
                break;
            }
        }
        //If statement to add the item if there is space
        if (location > (-1))
        {
            this.contents[location] = Item;
        }
        else
        {
            System.out.println("There is no space in your inventory");
        }
    }

    //Method to determine if the player has the item in their inventory
    public int hasItem(String item)
    {        
        //Use a while loop to check if an item (parameter) is in the player's inventory
        boolean found = false;
        int counter = 0;
        while (found == false && counter<MAX_ITEMS)
        {
            if (contents[counter].equals(item))
            {
                found = true;
            }
            counter++;
        }
        //If statement to determine the index if the object was found
        if (found == false)
        {
            return -1;
        }
        else
        {
            return counter;
        }
    }

    //Method to remove an item from the inventory
    public void removeItem(String item)
    {
        //Similar process to addItem() but to remove an item from the inventory
        boolean found = false;
        int counter = 0;
        while (found == false && counter < MAX_ITEMS)
        {
            if ((contents[counter]).equals(item))
            {
                found = true;
            }
            counter++;
        }
        if (found == true)
        {
            counter = counter - 1;
            contents[counter] = "empty";
        }
        else
        {
            System.out.println("The item entered is not in your inventory");
        }
    }

    //Method to return the players inventory in a string
    public String displayInventory()
    {
        String toDisplay = "";
        for (int i = 0; i < MAX_ITEMS; i++)
        {
            if (contents[i] != "empty")
            {
                //Displaying the contents of each index (inlcuding the empty slots) 
                toDisplay = toDisplay + contents[i] + " ";
            }
        }
        return toDisplay;
    }

}