Hi Spigot, At the moment I'm trying to make it so that after a certain amount of time after a certain block has been placed down, a random item will be dropped at the blocks position.. I've got the items list setup but I'm not sure how to get a random item from that list? Code (Text): public static ArrayList<Material> randomItems() { ArrayList<Material> items = new ArrayList<Material>(); items.add(Material.LEATHER_HELMET); items.add(Material.LEATHER_CHESTPLATE); items.add(Material.LEATHER_LEGGINGS); items.add(Material.LEATHER_BOOTS); return items; }
Use a random number generator to generate a random number preferably of the number of items in the array, and then use that to select the item from the array
Code (Java): ArrayList#get( ThreadLocaleRandom.current().nextInt(0, ArrayList#size() - 1) ); That negative one is important because the size method excludes 0, which is an index. So an array where index 0, 1, and 2 is present, size will return 3 (1, 2, 3). So if you were to land at the last number, the program wouldn't throw an ArrayIndexOutOfBoundsException exception. References: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ThreadLocalRandom.html#nextInt(int, int) https://docs.oracle.com/javase/7/docs/api/java/lang/ArrayIndexOutOfBoundsException.html https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html
Yeah i was going to do something similar.. yeah i know how to do the dropping part, but thanks. what about something helpful? Your helpful aren't you? lol Actually helpful thank you.
he is he linked you to your solution threadlocalrandom is helpful if you know java/kotlin/clojure/scala/what the fuck you use it'll end well
Use a Linked list and shuffle it: Code (Text): LinkedList<T> items = new LinkedList<>(); Collections.suffle(items); items.pop(); //It also removes the item from the list
