Solved Why are these equal?

I have a code, that should generate three lists with different items in them, but they are always the same.

Code:

List<ItemStack> itemL = new ArrayList<ItemStack>();
                List<ItemStack> levelL = new ArrayList<ItemStack>();
                List<ItemStack> successL = new ArrayList<ItemStack>();
                Random random = new Random();
                for (int x = 0; x < 102; x++) {
                    ItemStack item = new ItemStack(Material.STAINED_GLASS_PANE);
                    ItemMeta meta = item.getItemMeta();
                    int rand = random.nextInt(4);
                    int rand1 = random.nextInt(4);
                    int rand2 = random.nextInt(4);
                    switch (rand) {
                    case 0:
                        item.setDurability((byte) 3);
                        meta.setDisplayName(ChatColor.BLUE + "Common");
                        item.setItemMeta(meta);
                        break;
                    case 1:
                        item.setDurability((byte) 4);
                        meta.setDisplayName(ChatColor.YELLOW + "Uncommon");
                        item.setItemMeta(meta);
                        break;
                    case 2:
                        item.setDurability((byte) 1);
                        meta.setDisplayName(ChatColor.GOLD + "Rare");
                        item.setItemMeta(meta);
                        break;
                    case 3:
                        item.setDurability((byte) 14);
                        meta.setDisplayName(ChatColor.RED + "Ultra rare");
                        item.setItemMeta(meta);
                        break;
                    }
                    System.out.println(meta);
                    itemL.add(item);
                    switch (rand1) {
                    case 0:
                        item.setDurability((byte) 3);
                        meta.setDisplayName(ChatColor.BLUE + "Common");
                        item.setItemMeta(meta);
                        break;
                    case 1:
                        item.setDurability((byte) 4);
                        meta.setDisplayName(ChatColor.YELLOW + "Uncommon");
                        item.setItemMeta(meta);
                        break;
                    case 2:
                        item.setDurability((byte) 1);
                        meta.setDisplayName(ChatColor.GOLD + "Rare");
                        item.setItemMeta(meta);
                        break;
                    case 3:
                        item.setDurability((byte) 14);
                        meta.setDisplayName(ChatColor.RED + "Ultra rare");
                        item.setItemMeta(meta);
                        break;
                    }
                    levelL.add(item);
                    System.out.println(meta);
                    switch (rand2) {
                    case 0:
                        item.setDurability((byte) 3);
                        meta.setDisplayName(ChatColor.BLUE + "Common");
                        item.setItemMeta(meta);
                        break;
                    case 1:
                        item.setDurability((byte) 4);
                        meta.setDisplayName(ChatColor.YELLOW + "Uncommon");
                        item.setItemMeta(meta);
                        break;
                    case 2:
                        item.setDurability((byte) 1);
                        meta.setDisplayName(ChatColor.GOLD + "Rare");
                        item.setItemMeta(meta);
                        break;
                    case 3:
                        item.setDurability((byte) 14);
                        meta.setDisplayName(ChatColor.RED + "Ultra rare");
                        item.setItemMeta(meta);
                        break;
                    }
                    successL.add(item);
                    System.out.println(meta);
                }
                new AnimateGui(usedEnchanter, p, p.getOpenInventory().getTopInventory(), itemL, levelL, successL)
                        .runTaskTimer(EnchantingMainClass.getPlugin(), 0, 2);
            }

 

@Gorbit99
Did you debug? I would suggest adding System.outs..... in each case, not just afterwards.

 

@Gorbit99 For starters sit your sun out in the sun and let it dry out.

 

@Mrs. bwfctower Yeah, I know, I just couldn't bother shortening it, until it actually works. If you could help me with that though... I'll put it insde a function.

@Zombie_Striker I added sysouts to every possible spot. It seems like, that the randoms are working, they are different, the ItemMetas too, but the items are the same for some reasons. I started it with the class animategui, and the lists were the same, then I checked the randoms, they were different, then I checked the lists inside the class I copied inside the thread, they were the same, and then I checked the randoms once more, and the metas, they were different.

 

@Gorbit99
Looked at your code again. You add the same instance to each list. You never "reset" (items = new ItemStack). Even after you put it into the list, you modify it. If you add something to a list, and then modify it, the instance in the arraylist changes.

How to fix: After each time you add it to the array, use items = items.clone(); to make a new instance each time.

 

@Zombie_Striker Thank you for the quick reply, I didn't know that Arraylists work this way.

EDIT: I'm going to get to sleep right now, if it works, I'll mark this as solved

 

@Gorbit99
It's not how arraylists work. Its how Java handles updated objects.