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Minecraft 1.2.1

Finished, fully supported build — this is what the launcher gives you. Version facts below are read from Mojang’s own files — the official manifest plus the version.json inside the jar.

Contents (6)
  1. What changed in 1.2.1
  2. New files in the game
  3. New in-game text
  4. Reworded text
  5. Version facts
  6. Neighbouring versions

Java What changed in 1.2.1

Everything below is measured by comparing the game files of 1.1 with 1.2.1 — not copied from patch notes.

Minecraft did not ship a data generator until January 2018, so there is no registry of blocks and items to compare for a build this old. What is below is read from the game’s own client.jar: the text the game displays, and the textures, models and sounds it ships. New blocks and items almost always show up in both.

New files in the game

KindAddedRemovedTotal
Textures+50345

Textures added: mob/cat_black mob/cat_red mob/cat_siamese mob/ozelot mob/villager_golem

New in-game text 16

KeyText
container.brewingBrewing Stand
container.chestChest
container.craftingCrafting
container.creativeItem Selection
container.dispenserDispenser
container.enchantEnchant
container.furnaceFurnace
container.inventoryInventory
container.minecartMinecart
entity.Cat.nameCat
entity.Ozelot.nameOcelot
entity.SnowMan.nameSnow Golem
entity.VillagerGolem.nameIron Golem
item.expBottle.nameBottle o' Enchanting
item.fireball.nameFire Charge
tile.redstoneLight.nameRedstone Lamp

Reworded text 3

Wording Mojang changed in this version.

KeyBeforeAfter
entity.PigZombie.namePig ZombieZombie Pigman
item.bootsGold.nameGolden bootsGolden Boots
item.bucketLava.nameLava bucketLava Bucket

Version facts

EditionJava Edition
TypeStable release
Release date29 February 2012
Minimum Java versionJava 8
Asset indexpre-1.6
Client jar3.8 MB sha1 c7662ac43dd0…
Previous1.1
Next1.2.2
Official metadata1.2.1.json
PlatformsWindows macOS Linux
Written inJava
DeveloperMojang Studios