{{Infobox version
|title=Minecraft 12w03a
|image=Java Edition 12w03a.png
|edition=Java
|type=Snapshot
|parent=1.2.1
|date=January 19, 2012
|clientdl=[https://vault.omniarchive.uk/archive/java/client-release/1.2/pre/12w03a.jar Client]
|jsondl=[https://archive.org/download/Minecraft-JSONs/12w03a.json .json]
|serverdl=[https://vault.omniarchive.uk/archive/java/server-release/1.2/pre/12w03a.jar Server]
|prevparent=1.1
|next=12w04a
|nextparent=1.2.2
}}<onlyinclude>

'''12w03a''' is the first [[snapshot]] for [[Java Edition 1.2.1]], released on January 19, 2012,<ref>{{cite|url=http://web.archive.org/web/0/http://www.mojang.com/2012/01/minecraft-snapshot-12w03a/|title=Minecraft Snapshot 12w03a|author=Jens Bergensten|website=Mojang.com|date=January 19, 2012}}</ref> which added [[jungle]] biomes and jungle trees.

== Additions ==
=== Blocks ===
; [[File:Jungle Leaves JE1 BE2.png|32px]] [[Jungle leaves]]
* Generates in jungle trees.

; [[File:Jungle Log Axis Y JE1 BE1.png|32px]] [[Jungle log]]
* Slightly-mossy brown textured with horizontal bark.
* Generates in jungle trees.

=== World generation ===
; [[Biome]]s
* Added [[jungle biome]].
* Thick canopy with jungle trees, vines, fern, and brightly-colored grass.

== Changes ==
=== Blocks ===
; [[Ladder]]s
* Regained collision box.

; [[Vine]]s
* Are now climbable if the player was pushed into a solid block while next to them.

=== Items ===
; [[Spawn egg]]s
* [[Dispenser]]s can spawn mobs when dispensing spawn eggs.
* Spawn eggs are now stackable to 64.

=== Mobs ===
; [[Wolves]]
* Have new AI.
* Can be bred by using [[raw chicken]], [[cooked chicken]], [[raw porkchop]], [[cooked porkchop]], [[raw beef]], [[steak]], and [[rotten flesh]] when tamed.

; [[Zombie]]s
* Have new path-finding AI.

=== General ===
; [[Language]]s
* Updated language files.</onlyinclude>

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.0}}

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