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{{Infobox version
|title=Minecraft 15w31a
|image=Java Edition 15w31a.png
|edition=Java
|type=Snapshot
|date=July 29, 2015
|parent=1.9
|clienthash=d702effa2e2ff9f79ffc74dc6becc3eeca376fee
|jsonhash=bd5a158581e6ceec4c34b32774153661b63913e3
|serverhash=7799f1f6a486be08185b470a64ca4649e37de578
|exehash=69df0c2615d2ea5ebe08381df6d1bbd3c403c036
|prevparent=1.8.9
|next=15w31b
|nextparent=1.9.1
}}<onlyinclude>

'''15w31a''' is the first [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.9]], released on July 29, 2015,<ref>{{cite|url=https://www.mojang.com/2015/07/minecraft-snapshot-15w31a/|archive-url=https://web.archive.org/web/20150811074811/https://mojang.com/2015/07/minecraft-snapshot-15w31a/|title=Minecraft snapshot 15w31c|author=[[Minecraft:Dinnerbone]]|website=Mojang.com|date=July 29, 2015}}</ref> with a large amount of [[Minecraft:End]]-related changes. This is the first snapshot released in 2015.<ref group="note">Not counting [[Minecraft:15w14a]], which was an April Fools' joke snapshot</ref>

== Additions ==
=== Blocks ===
'''[[File:Chorus Plant JE1 BE1.png|32px]] [[Minecraft:Chorus plant]]s'''
* Generate in [[Minecraft:the End]].
* Can be grown using chorus flowers.
* Breaks in quick succession if the supporting chorus plant below is broken.
* Drop [[Minecraft:chorus fruit]].

'''{{Animate|Chorus Flower JE1 BE1.png; Chorus Flower Dead JE1 BE1.png|32px}} [[Minecraft:Chorus flower]]s'''
* Spawn on the top of the chorus trees.
* Break if the supporting block below is broken.
** It only drops when mined directly.
* Can only be planted on [[Minecraft:End stone]] in any dimension.
* Has a different texture when it can no longer grow.

'''[[File:Dragon Head (S) JE1.png|32px]] [[Minecraft:Dragon head]]s'''
* While worn, the head's mouth opens and closes repeatedly when moving around.
* When powered with redstone while placed on solid block, the jaw starts to open and close.
** Keeps the mouth position of the exact moment it was unpowered.

'''[[File:End Gateway JE1.png|32px]] [[Minecraft:End gateway block]]s'''
* A portal block used to transport the player to the new outer regions of the end.
** The texture is identical to the [[Minecraft:End portal]] block, but the model is that of a full block rather than plane.
* The player cannot use {{control|pick block}} or {{cmd|give}} to obtain it.
** It can only be set by using {{cmd|setblock}}.
* Naturally generate after killing the dragon and traveling someplace new in the End with it.
* Show yellow beacon beam when created and used.
* Emits light level of 15.

'''[[File:End Rod (U) JE1 BE1.png|32px]] [[Minecraft:End rod]]s'''
* Generate in the [[Minecraft:End cities]].
* Placeable horizontally and vertically.
* Emits light level of 14.
** The model has a little base that is oriented against the block it was placed on.
*** If placed on top of another rod, then it has the opposite orientation.
* Produce white particles.
* Used as a lighting source with the same efficacy as torches.
* Unlike torches, they are tangible.
** Horizontal End rods can be stepped up onto like slabs.

'''[[File:End Stone Bricks JE1 BE1.png|32px]] [[Minecraft:End stone bricks]]'''
* Generate in the End cities.
* Can be crafted with 4 blocks of [[Minecraft:End stone]].

'''[[File:Dirt Path JE1 BE1.png|32px]] [[Minecraft:Grass path]]s'''
* Are visually 15/16 block high.
* Obtainable by right-clicking [[Minecraft:grass block]]s with a shovel.
** This reduces the shovel's durability by one.
* Drop dirt, even when using Silk Touch.
* Cannot be obtained from the Creative inventory.
** But unlike farmland, it can be obtained by using the {{control|pick block}} key in Creative.

'''[[File:Purpur Block JE1 BE1.png|32px]] [[Minecraft:Purpur block]]s'''
* Generate in the End cities.
* Can be crafted with [[Minecraft:popped chorus fruit]].

'''[[File:Purpur Pillar (UD) JE1 BE1.png|32px]] [[Minecraft:Purpur pillar]]s'''
* Generate in the End cities.
* Can be crafted with purpur slabs.

'''[[File:Purpur Slab JE1 BE1.png|32px]] [[Minecraft:Purpur slab]]s'''
* Generate in the End cities.
* Can be crafted with purpur blocks.

'''[[File:Purpur Stairs JE1 BE1.png|32px]] [[Minecraft:Purpur stairs]]'''
* Generate in the End cities.
* Can be crafted with purpur blocks.

'''[[File:Structure Block JE1.png|32px]] [[Minecraft:Structure block]]s'''
* Only placable via {{cmd|setblock}}.
* Can be used with [[Minecraft:NBT]] parameters ({{cmd|setblock}} or {{cmd|blockdata}}).
** GUI is only used by Mojang employees.
* Have a letter on the texture based on its mode.

=== Items ===
'''[[File:Spectral Arrow (item) JE1.png|32px]] [[Minecraft:Spectral arrow]]s'''
* The tip is gold colored, but just in the item model.
* Show mob and player outlines in their respective team color when hit – even when invisible.
* Tag for entities to disable outlines. {{more info|please add corresponding tag here}}
* Tag to force outline: <code>{Glowing:1b}</code>.
* The glowing is a status effect.
* Crafted by surrounding an [[Minecraft:arrow]] with 4 [[Minecraft:glowstone dust]].
** Yields 2 spectral arrows.

'''{{Animate|Tipped Arrow JE1.png; Arrow of Night Vision JE1 BE1.png; Arrow of Invisibility JE1 BE1.png; Arrow of Leaping JE1 BE1.png; Arrow of Fire Resistance JE1 BE1.png; Arrow of Swiftness JE1 BE1.png; Arrow of Slowness JE1 BE1.png; Arrow of Water Breathing JE1 BE1.png; Arrow of Healing JE1 BE1.png; Arrow of Harming JE1 BE1.png; Arrow of Poison JE1 BE1.png; Arrow of Regeneration JE1 BE1.png; Arrow of Strength JE1 BE1.png; Arrow of Weakness JE1 BE1.png|32px}} [[Minecraft:Tipped arrow]]s'''
* Arrows tipped with potions.
** 14 new arrow types in total.
** Each differently tipped arrow is available in the Creative inventory, just like enchanted books.
** Corresponding effect is applied on hit.

'''[[File:Beetroot JE1 BE1.png|32px]] [[Minecraft:Beetroot]]s'''
* Restore {{hunger|1}}.
* Spawn naturally in villages.
* Can be used to craft [[Minecraft:beetroot soup]].
* Can also be used to craft [[Minecraft:rose red]] dye.

'''[[File: Beetroot Seeds JE1 BE1.png|32px]] [[Minecraft:Beetroot seeds]]'''
* Used to grow beetroot.

'''[[File:Beetroot Soup JE1 BE1.png|32px]] [[Minecraft:Beetroot soup]]'''
* Restores {{hunger|6}}.
* Crafted from 6 [[Minecraft:beetroot]]s and a [[Minecraft:bowl]].

'''[[File:Chorus Fruit JE1 BE1.png|32px]] [[Minecraft:Chorus fruit]]s'''
* Obtained from [[Minecraft:chorus plant]]s.
* Can be eaten even if the player is not hungry, similar to [[Minecraft:golden apple]]s.
** Teleports the player to a random nearby location when eaten (like an [[Minecraft:enderman]] or a [[Minecraft:shulker]]).
** Does not heal hunger points if the hunger bar is full.
*** Otherwise it heals {{hunger|4}}.
* Can be cooked in the [[Minecraft:furnace]] to obtain popped chorus fruits.

'''[[File:Popped Chorus Fruit JE1 BE1.png|32px]] [[Minecraft:Popped chorus fruit]]s'''
* Obtained from cooking [[Minecraft:chorus fruit]].
* Used to craft [[Minecraft:purpur block]]s.
* Cannot be eaten.

'''{{InvSprite|Shulker Spawn Egg Revision 1}} [[Minecraft:Shulker spawn egg]]s'''
* Used to spawn a [[Minecraft:shulker]].
* Purple with darker purple spots.

=== Mobs ===
'''General'''
* Mobs have a 5% chance to spawn left-handed, through the new <code>LeftHanded</code> boolean tag.
** Mobs able to hold items hold them according to their dominant hand.

'''[[File: Shulker.png|32px]] [[Minecraft:Shulker]]s'''
* Short for "''Shell Lurker''".
* Hostile mobs with the appearance of a purple block.
** Only spawn on the ground or at the walls of End cities when they first generate.
* When attacking, they open their shell with a spinning animation, revealing the creature inhabiting.
** The creature looks like a little white cube with big eyes.
** Its attack consists of shooting projectiles.
*** The projectiles chase the player until the projectile is out of range.
**** They can only move along one of the three grid axes at a time and on integer steps.
***** This means they can move only via [[Minecraft:taxicab distance|taxicab geometry.]]
*** Projectiles can be knocked away by attacking them.
*** Getting hit by a projectile causes 2 hearts of damage and inflicts the Levitation status effect.
*** They take more damage while their shell is open.
**** Their shells are considered armor, and bounce arrows off.
** It has an idle animation, where it opens its shells a little to peak through.
* Can be pushed by [[Minecraft:piston]]s, and can exist only on coordinates that are integers (except if they are on [[Minecraft:minecart]]s).
* Can teleport like an [[Minecraft:enderman]].
** Sometimes does this while being attacked or placed in unusual circumstances:
*** Removing its support block.
*** Pushing it into a non-air block (except piston heads).
*** Pushing a non-air block into its position (except piston heads).
* Is one of the few entities (apart from [[Minecraft:boat]]s and minecarts) that can be stood upon.
** It even displaces the player properly during its attacking and idle animations.

=== World generation ===
'''{{EnvLink|End City|End cities}}'''
* Generate on the new outer End islands.
* Dungeon-type structure fashioned like a branching tower made of [[Minecraft:End stone]] and many of the new blocks.
** Resemble a tree house.
* Generate with [[Minecraft:shulker]]s in it.

'''{{EnvLink|End Ship|End ships}}'''
* Can generate up in the air, right next to an End city.
** Always generate sailing away from what appears to be a pier.
** Composed of many of the same materials as the End city.
* Generate with [[Minecraft:shulker]]s in it.
* Have a [[Minecraft:beacon]] set to Speed, a [[Minecraft:brewing stand]] with [[Minecraft:potion]]s of Healing, and other loot.

'''[[File:Chorus plant.png|32px]] [[Minecraft:Chorus tree]]s'''
* Tree-like arrangements of the new [[Minecraft:chorus plant]] and [[Minecraft:chorus flower]] blocks.
* Generate on the outer End islands
* The whole structure is destroyed when the bottom-most block is destroyed, like [[Minecraft:cacti]].
* Can be farmed by planting the chorus fruit flowers that come from the top of the plants.
** Unlike cacti, chorus plants do not require the supporting block to be below it, but rather adjacent.
*** This allows the structure to grow around obstacles, like other plants.

'''[[File:End gateway JE1.png|32px]] [[Minecraft:End gateway]]s'''
* Small structures consisting of an [[Minecraft:End gateway block]] and two little bulbs of bedrock, at both the bottom and the top.
** Are an alternative way of traveling to the outer End islands, without having to build or fly all the way over there.
** Since the bulbs of bedrock only leave a one block slit on the horizontal plane, it is only accessible by throwing [[Minecraft:ender pearl]]s at it, or by riding [[Minecraft:pig]]s, [[Minecraft:boat]]s or [[Minecraft:minecart]]s.
*** The player is teleported to somewhere on the outer End islands.
*** The final location of the player depends on what angle they entered or at what angle the ender pearl was thrown at.
* One gateway is created for each dragon kill.
** Up to 20 gateways are possible to create this way.
** Gateways spawn in a radius around the End portal.
** Another gateway is created every time the player teleports to a new location.
*** The created gateway is linked to the original, so the player has a way back.

=== Command format ===
'''[[Minecraft:NBT format]]'''
* Added tags <code>HandItems</code>, <code>ArmorItems</code>, <code>HandDropChances</code>, and <code>ArmorDropChances</code> to <code>Living</code>.
* Added tags <code>HandItems</code> and <code>ArmorItems</code> to <code>ArmorStand</code>.
* Added tag <code>Glowing</code> to <code>Entity</code>.
* Added tag <code>Team</code> to <code>LivingBase</code>.
* Added tag <code>DragonPhase</code> to <code>EnderDragon</code>
* Added entity <code>Shulker</code>, child of <code>SnowMan</code>.
* Added entity <code>ShulkerBullet</code>, child of <code>Entity</code>.
* Added entity <code>DragonFireball</code>, which extends <code>FireballBase</code> and has no unique tags.
* Added entities <code>TippedArrow</code> and <code>SpectralArrow</code>, children of <code>Arrow</code>.
* Added block <code>EndGateway</code>, child of <code>TileEntity</code>.
* Added block <code>Structure</code>, child of <code>TileEntity</code>.
* Added item tag <code>Potion</code>, child of <code>tag</code>.

=== Gameplay ===
'''Dominant hand option'''
* An option for players to change their dominant hand on their player model.
** Under "Skin Customization".
* Changes the orientation of the offhand slot in the hotbar (left often suits right-hand players better and vice versa).

'''[[Minecraft:Dual wield]]ing'''
* Players can now use both hands at the same time to do different actions, with the left and right mouse buttons.
** For example, if a player has a pickaxe in their main hand and a torch in their other hand, right clicking places the torch.
*** This happens because a pickaxe lacks a right click use, and therefore the game tries to then treat the other item as if it's being right clicked.
*** The player cannot click both buttons at the same time.
** This is achieved through an extra inventory slot called the "offhand" slot.
*** Pressing {{key|F}} (by default) switches whatever item is selected in the hotbar with the item in the offhand (including no item).
*** The offhand slot is displayed next to the hotbar when it's not empty (left for right-hand players and vice versa).
**** It's also available in the [[Minecraft:inventory]] screen.
* Only the main hand can be used for attacking.
** Even bows can't be used in the offhand.
* [[Minecraft:Bow]]s can be used when something else is in the offhand.
** Arrows in the offhand take priority over arrows in the rest of the inventory slots.
* The offhand model is invisible in first person view, while it's empty.
* Some attributes and enchantments apply to the offhand item, while others do not.

'''[[Minecraft:Status effect]]s'''
* {{EffectLink|Levitation}}
** Received when the player is hit by [[Minecraft:shulker]] projectiles.
** Makes player involuntarily float high into the air.
*** Can be used to get to higher places.
** Listed as a negative effect, due to the potential to kill from fall damage.
** Higher levels of Levitation result in faster floating, except for the last two:
*** Level 255 does nothing.
*** Level 254 results in slow fall (similar to lunar gravity).

* {{EffectLink|Glowing}}
** Received when players or mobs are hit by [[Minecraft:spectral arrow]]s.
** Makes player's outline glow, seen even through non-transparent blocks.
*** The outline includes the models of the currently held items.
** Listed as a negative effect, because it prevents players from hiding from other players.
** It becomes colored differently if the player is part of a team, to match its team color.

== Changes ==
=== Blocks ===
'''[[Minecraft:Dead bush]]es'''
* Now drop anywhere between 0–2 [[Minecraft:stick]]s when broken without [[Minecraft:shears]].

'''[[Minecraft:Door]]s'''
* Changed the shading on acacia, birch, dark oak and jungle doors.

'''[[Minecraft:Fire]] '''
* The block states ''flip'' and ''alt'' were removed, and the integer state ''upper'' was reimplemented as the byte state ''up''.
** This reduced the number of states representing fire from 3072 to 512.

'''[[Minecraft:Glass pane]]s and [[Minecraft:iron bars]]'''
* Are now 2×2 pixels in footprint if no blocks connect to them.
** This is compared to the big cross configuration that was the default.

'''[[Minecraft:Pressure plate]]s'''
* Now have a slightly thinner item model.

'''[[Minecraft:Redstone wire]]'''
* Model was changed somewhat, resulting in subtle appearance differences.
** Before:<br>[[File:Inactive Redstone Wire (unconnected) JE1.png|32px]] [[File:Inactive Redstone Wire (NS) JE3.png|32px]] [[File:Inactive Redstone Wire (EW) JE3.png|32px]] [[File:Inactive Redstone Wire (NE) JE3.png|32px]] [[File:Inactive Redstone Wire (ES) JE3.png|32px]] [[File:Inactive Redstone Wire (SW) JE3.png|32px]] [[File:Inactive Redstone Wire (NW) JE3.png|32px]] [[File:Inactive Redstone Wire (NEW) JE3.png|32px]] [[File:Inactive Redstone Wire (NES) JE3.png|32px]] [[File:Inactive Redstone Wire (ESW) JE3.png|32px]] [[File:Inactive Redstone Wire (NSW) JE3.png|32px]] [[File:Inactive Redstone Wire (NESW) JE3.png|32px]]<br>[[File:Active Redstone Wire (unconnected) JE1.png|32px]] [[File:Active Redstone Wire (NS) JE3.png|32px]] [[File:Active Redstone Wire (EW) JE3.png|32px]] [[File:Active Redstone Wire (NE) JE3.png|32px]] [[File:Active Redstone Wire (ES) JE3.png|32px]] [[File:Active Redstone Wire (SW) JE3.png|32px]] [[File:Active Redstone Wire (NW) JE3.png|32px]] [[File:Active Redstone Wire (NEW) JE3.png|32px]] [[File:Active Redstone Wire (NES) JE3.png|32px]] [[File:Active Redstone Wire (ESW) JE3.png|32px]] [[File:Active Redstone Wire (NSW) JE3.png|32px]] [[File:Active Redstone Wire (NESW) JE3.png|32px]]
** After:<br>[[File:Inactive Redstone Wire (unconnected) JE2.png|32px]] [[File:Inactive Redstone Wire (NS) JE4.png|32px]] [[File:Inactive Redstone Wire (EW) JE4.png|32px]] [[File:Inactive Redstone Wire (NE) JE4.png|32px]] [[File:Inactive Redstone Wire (ES) JE4.png|32px]] [[File:Inactive Redstone Wire (SW) JE4.png|32px]] [[File:Inactive Redstone Wire (NW) JE4.png|32px]] [[File:Inactive Redstone Wire (NEW) JE4.png|32px]] [[File:Inactive Redstone Wire (NES) JE4.png|32px]] [[File:Inactive Redstone Wire (ESW) JE4.png|32px]] [[File:Inactive Redstone Wire (NSW) JE4.png|32px]] [[File:Inactive Redstone Wire (NESW) JE4.png|32px]]<br>[[File:Active Redstone Wire (unconnected) JE2.png|32px]][[File:Active Redstone Wire (NS) JE4.png|32px]] [[File:Active Redstone Wire (EW) JE4.png|32px]] [[File:Active Redstone Wire (NE) JE4.png|32px]] [[File:Active Redstone Wire (ES) JE4.png|32px]] [[File:Active Redstone Wire (SW) JE4.png|32px]] [[File:Active Redstone Wire (NW) JE4.png|32px]] [[File:Active Redstone Wire (NEW) JE4.png|32px]] [[File:Active Redstone Wire (NES) JE4.png|32px]] [[File:Active Redstone Wire (ESW) JE4.png|32px]] [[File:Active Redstone Wire (NSW) JE4.png|32px]] [[File:Active Redstone Wire (NESW) JE4.png|32px]]

'''[[Minecraft:Stairs]]'''
* Are now rotated 90° in the inventory.

'''[[Minecraft:Trapdoor]]s'''
* No longer require supporting blocks.
** Therefore they can be moved by [[Minecraft:piston]]s freely.
* An open trapdoor may be climbed like a [[Minecraft:ladder]] if it is directly above one and on the same side of the block.

=== Items ===
'''[[Minecraft:Bow]]s'''
* The bow in the hotbar now shows an animation for drawing back an [[Minecraft:arrow]].
* Arrows in the off hand are prioritized over arrows in the rest of the [[Minecraft:inventory]] slots.

'''[[Minecraft:Ender pearl]]s'''
* Can now be thrown in [[Minecraft:Creative]] mode.

'''[[Minecraft:Fishing rod]]s'''
* Casting fishing rods now has an animation in the hotbar/inventory.

'''Item models for chest-like blocks'''
* Unlike other blocks, [[Minecraft:chest]]s, [[Minecraft:trapped chest]]s and [[Minecraft:ender chest]]s have their item model rotated, to have the front face in view of the player.
** This made it easier to distinguish between trapped and regular chests while being held, since only their front face is different.

'''[[Minecraft:Map]]s'''
* Now display as a mini map when held in the off hand, or if the offhand slot is occupied.
** The (old) large version is visible only when held in the dominant hand with both hands-free.

'''[[Minecraft:Potion]]s'''
* Mixed potions' colors now blend.
* Numeric IDs are no longer used. Instead, a "Potion" tag is used.
** e.g. {{cmd|give @s minecraft:potion 1 0 {Potion:"minecraft:swiftness"} }}
* Splash potions now have a separate data value and ID name and can be created from all potions, including water bottles.
* Added Mundane, Thick and Awkward potions to the Creative inventory.
* [[Minecraft:Glowstone dust]] or [[Minecraft:redstone]] can no longer be added to extended or tier-II potions, respectively.
* Most recipes for [[Minecraft:potion of Weakness]] were removed; only brewing from a [[Minecraft:water bottle]] remains.
* [[Minecraft:Potion of Slowness]] can no longer be brewed from a [[Minecraft:potion of Fire Resistance]].
* [[Minecraft:Potion of Harming]] can no longer be brewed from a [[Minecraft:potion of Water Breathing]].
* Splash potions now have the same duration as drinkable potions.<ref>{{bug|MC-85891}}</ref>

=== Mobs ===
'''[[Minecraft:Chicken]]s'''
* Can be led and bred with [[Minecraft:melon seeds]], [[Minecraft:pumpkin seeds]], and [[Minecraft:beetroot seeds]], in addition to regular [[Minecraft:wheat seeds|seeds]].

'''[[Minecraft:Ender dragon]]s'''
* Similar to the one on [[Minecraft:Legacy Console Edition]].
* The dragon can be re-spawned indefinitely by creating a creeper face configuration out of [[Minecraft:clay]] in [[Minecraft:the End]].
** Subsequent dragons spawn new gateways, but don't drop [[Minecraft:XP]] or create new [[Minecraft:dragon egg]]s.
* The dragon AI and attacks has been changed:
** Breathes fire/purple particles on players and mobs, while on top of the portal.
** Drops fireballs on top of the player.
** Defends the obsidian pillars more, the further the fight progresses.
* The dragon flies and stops over the portal sometimes, only then can the last blow be dealt.

'''[[Minecraft:Endermen]]'''
* Remain aggravated towards the player despite being in contact with [[Minecraft:water]].
* Drop the block they were holding when killed.

'''[[Minecraft:Pig]]s'''
* Can be led and bred with [[Minecraft:potato]]es and [[Minecraft:beetroot]]s, in addition to [[Minecraft:carrot]]s.

'''[[Minecraft:Skeleton]]s'''
* Have an animation for lifting up and drawing back their [[Minecraft:bow]].

'''[[Minecraft:Villager]]s'''
* Farmer villagers now harvest beetroot.

=== Non-mob entities ===
'''[[Minecraft:Armor stand]]s'''
* Can now be summoned to dual wield with commands in Creative.

'''Projectiles'''
* Slightly altered the path of projectiles.<ref>https://www.reddit.com/r/Minecraft/comments/3f7m2y/minecraft_snowball_projectile_changes_snapshot/</ref>

=== World generation ===
'''[[Minecraft:The End]]'''
* A set amount of differently-sized obsidian pillars are arranged in a circular fashion.
** The tallest pillars have [[Minecraft:iron bar]]s around their [[Minecraft:ender crystal]] to deflect projectiles.
* The exit portal is pre-generated at the center of the island, but without the [[Minecraft:dragon egg]] and [[Minecraft:End portal (block)|portal blocks]].
* Now generates a great amount of islands in every direction from the main island, though separated from it in all directions by an empty gap of about 1,000 blocks.
** Mini islands generate between the center and main islands.
** End islands and mini End islands have chorus trees spread throughout them.

'''[[Minecraft:The Nether]]'''
* Removed the [[Minecraft:fog]] in the Nether.

'''[[Minecraft:Village]]s'''
* Farms now include [[Minecraft:beetroot]] crops.

=== Command format ===
'''NBT format'''
* Tag <code>Equipment</code> (under <code>Living</code>) has become deprecated.
* Tag <code>DropChances</code> (under <code>Living</code>) has become deprecated.

=== Gameplay ===
'''Crosshair'''
* No longer shows the crosshair in 3rd person view.

'''[[Minecraft:Inventory]]'''
* Rearranged the Survival inventory and the Creative "Survival tab" to accommodate for the new offhand slot.
* Unified the orientation of many items in the inventory.

'''[[Minecraft:Status effect]]s'''
* Status effects icons are now displayed on the HUD on the right hand corner, instead of just in the inventory (similar to [[Minecraft:Pocket Edition]]).
** They are ordered by the time of infliction from right to left.
** Positive effects are on the top row and negative effects on the bottom row.
** Effects that are about to run out, blink.
*** They blink faster when they are closer to running out and start fading away.

=== General ===
'''Attributes'''
* <code>CustomNameVisible:true</code> makes the name tag on mobs show in the same way as on players.
* Entities can now be summoned straight to teams: <code>{team="TeamName"}</code>.
* <code>DropChances</code> and <code>Equipment</code> tags are no longer used.
** <code>ArmorItems</code>, <code>HandItems</code>, <code>ArmorDropChances</code> and <code>HandDropChances</code> are used instead.

'''[[Minecraft:Boss]]es'''
* Proper support for multiple bosses' health bars, so they show at the same time without obstructing each other.

'''Damage tooltips'''
* Items can damage differently based on where they are placed to (main hand, offhand, armor slots).

'''[[Minecraft:Death messages]]'''
* Death messages now are displayed on the player's death screen as well as in the chat.

'''[[Minecraft:Models]]'''
* Different models/textures can be used for each different damage values, item states, and whether the item is held in a different hand.
** This works on compasses, clocks, and anything that can have a durability bar.
** It also contains additional tags for bows and fishing rods.
* Models can be put together based on block state attributes, such as fences.
** As a result, the vanilla set of block models was reduced by almost 300.
* Block model JSON is now strict: comments and quote-less identifiers are not allowed.
* <code>display</code> tag defaults have changed, and the <code>thirdperson</code> and <code>firstperson</code> tags were replaced with <code>thirdperson_righthand</code>, <code>thirdperson_lefthand</code>, <code>firstperson_righthand</code>, and <code>firstperson_lefthand</code>.
* <code>parent</code> and <code>elements</code> tags can coexist now, though the top level elements tag overwrites all former ones.
* UV is now optional, and if not supplied it automatically generates based on the element's position.

'''[[Minecraft:Options]]'''
* Removed the ''Broadcast Settings'' section, as well as Twitch integration as a whole.
* Removed ''Super Secret Settings'' and ''Alternate Blocks'' from video settings.

'''[[Minecraft:Resource pack]]s'''
{{Resource pack format/value|2}}
* Older resource packs require user acknowledgment to use.

'''Structure data'''
* Now comes from <code>/assets/structures</code>.

== Fixes ==
{{fixes|fixedin=15w31a|prefix=Minecraft
|;old
|438|Ender pearl can't be used in creative mode.
|1537|Sometimes doors in strongholds are misplaced.
|1663|Dying while having a GUI window open doesn't make the death screen appear.
|1956|Arms misplaced in skeletons with a bow.
|2768|Ladder bug with trapdoors.
|4474|Boss health bar temporarily viewable after respawn and loading another world.
|42841|Incorrect Creative instant health damage value.
|47526|Ender Crystal entity spawning 1 block too low.
|5404|Name Tags/XP Orbs/Splash Potions are angled in third-person mode.
|56268|Breaking the bedrock below an ender crystal (in the End) creates performance drops, rapidly flickering light.
|68062|Boss health bar only visible when looking at boss.
|69320|Data tag output by {{cmd|entitydata}} and {{cmd|blockdata}} contains too many commas.
|75082|End music will stop every time the ender dragon loads out of view.
}}</onlyinclude>

== Videos ==
{{slicedlime|KkDVBM8l0-M}}

== Trivia ==
* Before [[Minecraft:18w43a]], 15w31a holds the record as having the most content in one developmental release, having nearly twice as much content as [[Minecraft:Java Edition 1.4.2]] had in October 2012.
** The previous record was held by [[Minecraft:13w36a]] for [[Minecraft:Java Edition 1.7.2]].
* 15w31a was previously removed from the [[Minecraft:launcher]] for some time, but was added back in September 2018.

== Footnotes ==
{{notelist}}

== References ==
{{reflist}}

== Navigation ==
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