rozna ilosc

Czy da sie zrobic zeby dropalo od 1-3 itemow randomowo? Wiem ze mozna oddzielnie robic te itemy ale to bez sensu. Chyba ze to jedyny sposob

			if(b.getType() == Material.CHEST){
				ItemMeta im = p.getItemInHand().getItemMeta();
				if(im.getDisplayName() != null){
					if(im.getDisplayName().toLowerCase().equalsIgnoreCase(Util.Color("&7&lStoneCase"))){
						b.setType(Material.AIR);
						if(Math.random() *100 < 1.125){
							ItemStack item17 = new ItemBuilder(Material.COBBLESTONE, 1).addEnchant(Enchantment.PROTECTION_ENVIRONMENTAL, 4).setName(Util.Color("&aCobbleX")).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item17);
						}
						if(Math.random() *100 < 5.30){
							ItemStack item21 = new ItemBuilder(Material.DIAMOND, 4).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item21);
						}
						if(Math.random() *100 < 5.27){
							ItemStack item22 = new ItemBuilder(Material.EMERALD, 4).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item22);
						
						}
						if(Math.random() *100 < 22){
							ItemStack item24 = new ItemBuilder(Material.COAL, 8).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item24);
						}
						if(Math.random() *100 < 18){
							ItemStack item27 = new ItemBuilder(Material.QUARTZ, 8).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item27);
						}
						if(Math.random() *100 < 2.12){
							ItemStack item28 = new ItemBuilder(Material.ENDER_PEARL, 2).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item28);

						}
						if(Math.random() *100 <= 0.125){
							ItemStack item30 = new ItemBuilder(Material.CHEST, 1).setName(Util.Color("&b&lPREMIUM&6&lCASE")).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item30);
						}
						if(Math.random() *100 < 6.118){
							ItemStack item31 = new ItemBuilder(Material.BOOK, 4).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(), item31);
						}
						if(Math.random() *100 < 12){
							ItemStack item32 = new ItemBuilder(Material.BONE, 4).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(),item32);
						}
						if(Math.random() *100 < 2){
							ItemStack item60 = new ItemBuilder(Material.REDSTONE, 4).toItemStack();
							b.getWorld().dropItemNaturally(b.getLocation(),item60);
							
						}
					}
				}
			}