{{Infobox guide
|edition=java
|name=
|vers=
* {{vl|je 1.2.1|}}
* {{vl|je 1.2.2|}}
* {{vl|je 1.2.3|}}
* {{vl|je 1.2.4|}}
* {{vl|je 1.2.5|}}
|prev=1.1
|next=1.3 releases
}}

This guide is a simplified overview of all the changes in the {{JE}} 1.2.x releases, which assumes at least some familiarity with Java Edition 1.1.

== Mobs ==
=== New ===
{|{{Simple Guide table|New Mobs}} 
|-
|[[Iron golem]]s
|[[File:Iron Golem JE1 BE1.png|128px|center]]
|
* Spawn occasionally in [[village]]s.
* Created when 4 [[iron block]]s are placed in a T-shape with a [[pumpkin]] on top.
|{{drop|1=item|2=Iron Ingot|3=3|4=5}}
{{drop|1=block|2=Rose|3=0|4=2}}
|Defend villages by attacking [[hostile mob]]s.
|-
|[[Ocelot]] and [[cat]]
|[[File:Ocelot JE1 BE1.png|128px|center]] {{Animate|Tuxedo Cat JE1 BE1.png;Red Cat JE1 BE1.png;Siamese Cat JE1 BE1.png|128px}} 
|Spawn in [[jungle]] biomes.
|{{xp|1|3}} (when killed by a [[player]] or tamed [[wolf]])
|
* Can be tamed using [[fish]].
* Ocelots turn into cats if tamed.
* Follow and teleport to the player if they get too far away.
* Cats scare off nearby [[creeper]]s.
|}

=== Changed ===
{|{{Simple Guide table|Changed Mobs}} 
|-
|[[Cave spider]]s
|[[File:Cave Spider JE1 BE1.png|128px]]
|Now swim quickly.
|-
|[[Creeper]]s
|[[File:Creeper JE3 BE1.png|84px]]
|No longer strafe to the player's left but now simply stop in front of the player when they are about to explode.
|-
|[[Villager]]s
|{{Animate|Farmer.png;Librarian.png;Priest.png;Blacksmith.png;Butcher.png;Nitwit.png|84px}}
|Now breed if there are enough empty houses in a [[village]].
|-
|[[Pig]] (Baby variant)
|[[File:Baby_Pig_JE1_BE1.png|84px]]
|Saddles can no longer be put on baby pigs. Saddled baby pigs from previous versions can update to this version and still be ridden.
|-
|[[Wolf]]
|[[File:Wolf JE1 BE1.png|84px]]
|Can now be [[bred]] through the use of any type of meat such as chicken ([[raw chicken|raw]] or [[cooked chicken|cooked]]), pork ([[raw porkchop|raw]] or [[cooked porkchop|cooked]]), beef ([[raw beef|raw]] or [[steak|cooked]]), and [[rotten flesh]] if tamed and at full [[health]].
|-
|[[Zombie]]s
|[[File:Zombie JE2 BE1.png|84px]]
|
* Can break down [[door]]s on Hard [[difficulty]] and in [[Hardcore]] mode.
* Have a rare chance to drop an iron ingot, iron helmet, iron shovel, or iron sword.
* Navigate to the nearest shadow or body of water for safety when they catch fire.
* Chase and attack villagers.
|-
|[[Skeleton]]s
|[[File:Skeleton JE4 BE2.png|84px]]
|
* Have a rare chance to drop a bow or an enchanted bow.
* Navigate to the nearest shadow or body of water for safety when they catch fire.
|-
|[[Snow golem]]s
|[[File:Snow Golem JE1 BE1.png|84px]]
|Melt and die in the [[Nether]].
|-
|[[Zombie pigmen]]
|[[File:Zombified Piglin JE3 BE2.png|84px]]
|
* Have a rare chance to drop a golden helmet, gold ingot, or golden sword (which may be enchanted).
* Swim faster in water.
|}

== Blocks ==
=== New ===
{|{{Simple Guide table|New Blocks}} 
|-
|[[Redstone lamp]]
|[[File:Redstone Lamp JE2 BE1.png|84px|center]]<br>[[File:Lit Redstone Lamp JE2 BE1.png|84px|center]]
|{{Crafting table|
|B1= Redstone Dust
|A2= Redstone Dust
|B2= Glowstone
|C2= Redstone Dust
|B3= Redstone Dust
|Output= Redstone Lamp
|type= Redstone
}}
|Any
|Gives off a light level of 15 when powered by [[redstone]].
|-
|[[Jungle log]]
|[[File:Jungle Log Axis Y JE1 BE1.png|84px|center]]
|rowspan=2 |Make up [[jungle tree]]s.
|Axe
|Can be crafted into [[jungle planks]].
|-
|[[Jungle leaves]]
|[[File:Jungle Leaves JE1 BE2.png|84px|center]]
|Shears
|Can drop jungle [[sapling]]s.
|-
|[[Jungle sapling]]
|[[File:Jungle Sapling JE1.png|84px|center]]
|Dropped by [[jungle leaves]].
|Any
|Can grow into jungle trees.
|-
|[[Spruce wood planks]]<br>[[Birch wood planks]]<br>[[Jungle wood planks]]
|{{Animate|Spruce Planks JE1 BE1.png;Birch Planks JE1 BE1.png;Jungle Planks JE1 BE1.png|84px}}
|
{{Crafting|
B2=Spruce Log;Birch Log;Jungle Log
|Output=Spruce Planks,4;Birch Planks,4;Jungle Planks,4
}}
|Axe
|Used in many [[crafting]] recipes.
|-
|[[Cut sandstone]] and [[chiseled sandstone]]
|[[File:Cut Sandstone JE1 BE1.png|84px|center]]<br>[[File:Chiseled Sandstone JE1 BE1.png|84px|center]]
|
{{Crafting
  |A2=Sandstone
  |B2=Sandstone
  |A3=Sandstone
  |B3=Sandstone
  |Output=Cut Sandstone,4
}}
{{Crafting
  |B2=Sandstone Slab
  |B3=Sandstone Slab
  |Output=Chiseled Sandstone
}}
|Pickaxe
|Decoration blocks.
|-
|[[Chiseled stone bricks]]
|[[File:Chiseled Stone Bricks JE1 BE1.png|84px|center]]
|[[Creative]] mode inventory.
|Pickaxe
|Decoration block.
|}

=== Changed ===
{|{{Simple Guide table|Changed Blocks}} 
|-
|[[Grass]]
|[[File:Grass JE1.png|84px]]
|Placing blocks on grass now replaces the grass.
|-
|[[Ladder]]
|[[File:Ladder (S) JE2 BE1.png|84px]]
|
* Re-added collision box.
* Crafting recipe now yields 3 ladders instead of 2.
|-
|[[Lava]]
|[[File:Lava JE11.gif|84px]]
|Now has a faint rumbling sound effect, and large particles that hop out of the lava produce a popping sound.
|-
|[[Cobweb]]
|[[File:Cobweb JE2.png|84px]]
|Now completely absorb all fall [[damage]].
|-
|[[Stairs]] and <br> [[Slab]]
|{{animate|Oak Stairs (N) JE1 BE1.png;Cobblestone Stairs (N) JE2 BE3.png;Brick Stairs (N) JE1.png;Nether Brick Stairs (N) JE3 BE1.png|84px}}<br>{{Animate|Sandstone Slab JE2 BE2.png;Oak Slab JE3 BE2.png;Cobblestone Slab JE2 BE2.png;Smooth Stone Slab JE2 BE2.png;Seamless Stone Slab JE2 BE1.png;Stone Brick Slab JE1 BE1.png;Brick Slab JE2 BE2.png|84px}}
|Crafting recipe for slabs now yields 6 instead of 3.
|-
|[[Vines]]
|[[File:Vines (N) JE1.png|84px]]
|Can now be climbed like ladders.
|-
|[[Wool]]
|{{Animate|Light Gray Wool JE1 BE1.png;Gray Wool JE1 BE1.png;Black Wool JE1 BE1.png;Brown Wool JE1 BE1.png;Red Wool JE1 BE1.png;Orange Wool JE1 BE1.png;Yellow Wool JE1 BE1.png;Lime Wool JE1 BE1.png;Green Wool JE1 BE1.png;Cyan Wool JE1 BE1.png;Light Blue Wool JE1 BE1.png;Blue Wool JE1 BE1.png;Purple Wool JE1 BE1.png;Magenta Wool JE1 BE1.png;Pink Wool JE1 BE1.png;|84px}}
|Slightly removed saturation out of every color, changing from [[File:Beta color spectrum.png|128px]] to [[File:1.2.4 color spectrum.png|128px]].
|}

== Items ==
=== New ===
{|{{Simple Guide table|New Items}}
|-
|[[Fire charge]]
|[[File:Fire Charge JE1 BE1.png|84px|center]]
|
{{Crafting
|Blaze Powder
|Coal;Charcoal
|Gunpowder
|Output=Fire Charge,3
}}
|
* Places [[fire]] when {{control|used}}.
* Can be fired from a [[dispenser]].
|-
|[[Bottle o' enchanting]]
|[[File:Bottle o' Enchanting JE1 BE1.png|84px|center]]
|[[Creative]] mode inventory.
|Spawns [[experience orb]]s when splashed.
|-
|[[Ocelot spawn egg]]
|[[File:Ocelot Spawn Egg JE1 BE1.png|84px|center]]
|[[Creative]] mode inventory.
|Spawns [[ocelot]]s when used.
|}

== Gameplay ==
=== Changed ===
{|{{Simple Guide table|Changed Gameplay}}
|-
|[[Controls]]
|When the hotbar is full, using {{ctrl|pick block}} replaces the held item.
|-
|[[Debug screen]]
|
* Added items:
** lc: Largest section height
** b: Current biome
** bl: Block brightness
** sl: Sky brightness
** rl: Raw brightness
|-
|[[Multiplayer]]
|Now that biome data saves to chunks, multiplayer servers no longer send clients the [[world seed]], instead the seed displays as "0" to the client.
|-
|[[Third person view]]
|
* Now has a slight delay on the speed at which the head moves on the player.
** Makes it possible to see the sides of the player's head.
|-
|[[Death screen]]
|Has a slight delay before buttons become active, to avoid accidentally clicking buttons when killed.
|}

== Biomes ==
=== New ===
{|{{Simple Guide table|New Biomes}} 
|-
|[[Jungle]]
|[[File:Jungle.png|184px|center]]
|A common and dense biome full of [[jungle tree]]s made up of [[jungle log]]s and [[jungle leaves]].
|Jungle trees
|}

== Structures ==
=== New ===
{| {{Simple Guide table|New Structures}}
|-
|[[Jungle tree]]
|[[File:Mega Jungle Tree.png|184px|center]]<br>[[File:Jungle Tree JE1 BE1.png|184px|center]]
|Found throughout [[jungle]] biomes
|None
|None
|Are comprised of a trunk of jungle logs with jungle leaves on top, and are covered in vines.
|-
|[[Desert well]]
|[[File:Desert Well JE1 BE1.png|184px|center]]
|Found rarely in [[desert]] biomes
|None
|None
|Are comprised of sandstone with a block of water in the middle.
|}

== See also ==
{{Navbox guides}}

[[es:Guías de Java Edition/Lanzamientos 1.2]]
[[ja:ガイド/Java Edition/1.2リリース]]
[[pt:Guias da Edição Java/Versões estáveis da 1.2]]
[[ru:Обзоры версий Java Edition/Полные выпуски 1.2]]
[[uk:Керівництва з Java Edition/Релізи 1.2]]
[[zh:Java版指南/1.2版本]]