Java Edition 13w01a

This page covers a development version that has a major issue under certain conditions.

 

Mining an empty jukebox creates an invisible "Air" item. Interacting with the item will crash the game and likely delete the chunk the jukebox was in.^[1]

13w01a

{
    "title": "13w01a",
    "images": [
        "13w01a Banner.png",
        "Java Edition 13w01a.png"
    ],
    "rows": [
        {
            "field": "''(link to Java Edition article, displayed as Java Edition)''",
            "label": "(link to Edition article, displayed as Edition)"
        },
        {
            "field": "January 3, 2013",
            "label": "Release date"
        },
        {
            "field": "(link to Snapshot article, displayed as Snapshot)",
            "label": "(link to Version types article, displayed as Type)"
        },
        {
            "field": "(link to Java Edition 1.5 article, displayed as 1.5)",
            "label": "Snapshot for"
        },
        {
            "field": "[https://vault.omniarchive.uk/archive/java/client-release/1.5/pre/13w01a.jar Client] ([https://meta.celestia.sh/versions/v1/13w01a.json .json]) <br />[https://vault.omniarchive.uk/archive/java/server-release/1.5/pre/13w01a.jar Server] ([https://vault.omniarchive.uk/archive/java/server-release/1.5/pre/13w01a.exe .exe]\n(link to Category:Versions using legacy download site article, displayed as Category:Versions using legacy download site))",
            "label": "(link to Tutorial:Installing a version#Manual version installation article, displayed as Downloads)"
        },
        {
            "field": "52",
            "label": "(link to Protocol version article, displayed as Protocol version)"
        },
        {
            "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_5 Java SE 5]</span>",
            "label": "<span normal;\">Minimum Java version</span>"
        }
    ],
    "invimages": [],
    "footer": "<table auto; word-break: break-word;\">\n<tr inherit;\">\n<td 0.4em\" rowspan=\"2\">[[Java Edition  1.4.7|<span  1.4.7]]</td>\n<td 0.4em\">'''[[Java Edition 1.5|1.5]]'''</td>\n<td 0.4em\" >[[Java Edition  1.5.1|  1.5.1 <span inherit;\">\n\n<td 0.4em\">''' 13w01a'''</td>\n<td 0.4em\">\n[[Java Edition  13w01b|  13w01b ►]]\n</td>\n</tr>\n</table>"
}

13w01a is the first snapshot for Java Edition 1.5, released on January 3, 2013.^[2] It mainly added an assortment of new redstone components. This is the first snapshot released in 2013.

Nether quartz ore

• New ore exclusive to the Nether.
• Drops 1 Nether quartz item when mined.
• Generates around netherrack.

Block of redstone

• Stores redstone dust similar to blocks of diamond, etc.
• Emits constant redstone power.
• Works as a pushable redstone power source.

Daylight sensors

• Output power while receiving sunlight.
• The level varies depending on the time (more sunlight = more redstone power), and it does not function at night.

Hoppers

• Places and takes out items in hoppers, chests, furnaces, minecarts with chests, dispensers, and brewing stands.
• Allows for the automation of many processes.
• Still a work in progress (as indicated by the inventory icon ).

Redstone comparator

• Has 3 inputs and 1 output. Input from the back is considered signal A, and whichever side gives the stronger signal is considered signal B.
• Has 2 modes: comparison and subtraction.
• In comparison mode, if A≥B, the output is A, otherwise output stays off.
• In subtraction mode, if A≥B, the output is A-B, otherwise output stays off.
• Replacement for the "capacitor" idea.

Trapped chests

• Gives out a signal depending on the amount of players looking inside. 1 player = 1 strength signal, 2 players = 2, etc.
• Crafted with a chest and a tripwire hook.
• Large trapped chests can be staggered with large chests to allow more compact storage.
• Texture is slightly different than a normal chest, with a red stain around the latch.

Weighted pressure plates

• Detects item stacks.
• Gold version reaches full strength at 60 items.
• Iron version reaches full strength at 600 items.
• Linear, so 10 strength signal means twice as many items as a 5 strength signal.

Nether brick

• Used for crafting Nether bricks.
• Obtained by smelting netherrack.

Nether quartz

• Item dropped from Nether quartz ore.

Locked chests

• Texture for the block was changed from .

Pistons

• Are more stable from previous versions.
  • Sticky pistons are less sticky.​^{[more information needed]}

Redstone circuits

• Are now more consistent.

General

• Now shows the item name in-game.

Death messages

• Now show the weapon someone was killed with.​^{[more information needed]}

Inventory management

• Double-click items to fill the stack up as much as possible.
• Drag item stacks around​^{[more information needed]} to divide them up over the dragged-over slots.
• Drag item stacks around with  Right Mouse Button to place one of that stack in each dragged-over slot, if that slot is not occupied already.
• Shift double-click an item stack to move all other item stacks of that kind to that part of the inventory.
• Press Q while the mouse is over an item in the inventory or a container to drop it.

• [MC-5711] Redstone torches attached to the side of a block do not pop off if the block supporting them is destroyed.
• [MC-5721] Dragging to spread an item out in the Creative inventory, then clicking on the inventory tab, and placing the 0 stack item down, the game crashes.
• [MC-5728] Infinite loop caused by subtraction mode comparators causes the world to be unplayable.
• Mineral duplication: players can exponentially dupe minerals by putting then in a crafting table with a block of their material, then double clicking on a mineral in the crafting table, works on the same principle as the method below.
• Crafted item duplication: any stackable crafted item can be duplicated by setting up its recipe in a crafting table, then double clicking an existing version of this item in the inventory. Requires at least one of that item to be present in the inventory.

3 issues fixed

From released versions before 1.5

• MC-177 – [12w26a] Clocked piston arm turns invisible when exiting game/dying/etc.
• MC-184 – [Beta 1.2] (Powered) redstone doesn't update right.
• MC-5621 – [Beta 1.7] Blocks like redstone dust, repeaters, doors, and levers don't drop when the underlying block is pushed by a piston.

• 
  A bug with torches in this version.

• Along with 18w01a, 13w01a was released on the earliest calendar year out of all snapshots, on January 3.
  • Until this point, the snapshot released on the earliest calendar year out of all snapshots was 12w01a on January 5.
• 13w01a is the first snapshot to feature a version banner alongside the official changelog.