Collectible HW

List Task

public void addBulkItems(List<Collectible> newItems) {
    my_collection.addAll(newItems); // adds teh items from the other lists
}

public void removeBulkItems(List<Collectible> itemsToRemove) {
    my_collection.removeAll(itemsToRemove); // removes items from another list
}

Dictionary Task

// updates the value by percentage
public void updateItemValue(String itemName, double percentage) {
    if (item_details.containsKey(itemName)) {
        double currentValue = item_details.get(itemName).getValue();
        item_details.get(itemName).setValue(currentValue * (1 + percentage / 100));
    }
}

// filters the items by rarirty
public List<Collectible> filterByRarity(int rarityLevel) {
    return item_details.values().stream()
        .filter(item -> item.getRarity() == rarityLevel)
        .collect(Collectors.toList());
}

Set Task

Set<Collectible> traded_items = new HashSet<>();
Set<Collectible> duplicate_items = new HashSet<>();

public void addItem(Collectible item) {
    if (traded_items.contains(item)) {
        duplicate_items.add(item);  // stores/logs if its a dupe
    } else {
        traded_items.add(item);  // if not, it adds to the main set
    }
}

Print Method

public void printInventory() {
    System.out.println("Item Name\tRarity\tValue");
    for (Collectible item : my_collection) {
        System.out.println(item.getName() + "\t" + item.getRarity() + "\t" + item.getValue());
    }
}

Bonus Challenge

Stack<String> folderStack = new Stack<>();
folderStack.push("weapons");
folderStack.push("Magic");
folderStack.push("Fire");

// prints the current task
System.out.println(String.join(" > ", folderStack));  // output: weapons > Magic > Fire

// goes back from teh fire
folderStack.pop();
System.out.println(String.join(" > ", folderStack));  // output: weapons > Magic