client.jar

This article is about the main source code. For the launcher marked for "Linux / Other", see Minecraft launcher.

minecraft.jar is the main code source for Minecraft. It is located in the ../.minecraft/versions/(current version) directory, or the ../minecraft/versions/(current version) directory in OS X. When using the latest version of the minecraft launcher, it is named <gameversion>.jar

It can be opened using a file archiving program or a Java decompiler.

Jar versions

The minecraft.jar file is found in its version folder. It is accompanied by a .json file that lists the version's attributes. Normal versions are available to choose from via the launcher, and snapshots are also available. It's even possible to download alpha versions, and create your own version file to install mods on. Note that creating a new version is the only way to install mods; the launcher keeps normal versions synced.

Files in minecraft.jar

In minecraft.jar many files can be found, they can be categorized like this:

• Texture files: Textures used by Minecraft, all in .png format.
• Class files: Compiled Java code that Minecraft uses for program logic. These files (classes) are named like "acq" or "qn" because they have been run through an obfuscation tool to hide the names of methods, variables and classes. However, they can still be disassembled to understand their functionality.
• Language files: Language files are used to change the messages in the game (achievements, tooltips, menu). It does not affect in-game chat.
• Text files: Files that contain easy to edit text, such as splashes and texture pack descriptions, another text file is achievements/map.txt that contain code for the creation of the achievements menu background.
• The META-INF directory: Contains information about the game files.

File Hierarchy

As of Minecraft 1.7.10, Java class files have been omitted for brevity. Sorted by type, then by name.

minecraft.jar assets minecraft font glyph_sizes.bin lang en_US.lang shaders post antialias.json art.json bits.json blobs.json blobs2.json blur.json bumpy.json color_convolve.json deconverge.json desaturate.json flip.json fxaa.json green.json invert.json notch.json ntsc.json outline.json pencil.json phosphor.json scan_pincushion.json sobel.json wobble.json program blit.vsh blobs.vsh bumpy.vsh downscale.vsh flip.vsh fxaa.vsh invert.vsh sobel.vsh antialias.json bits.json blit.json blobs.json blobs2.json bloom.json blur.json bumpy.json color_convolve.json deconverge.json downscale.json flip.json fxaa.json invert.json notch.json ntsc_decode.json ntsc_encode.json outline_combine.json outline_soft.json outline_watercolor.json outline.json overlay.json phosphor.json scan_pincushion.json sobel.json wobble.json antialias.fsh bits.fsh blit.fsh blobs.fsh blobs2.fsh blur.fsh bumpy.fsh color_convolve.fsh deconverge.fsh downscale.fsh fxaa.fsh invert.fsh notch.fsh ntsc_decode.fsh ntsc_encode.fsh outline_combine.fsh outline_soft.fsh outline_watercolor.fsh outline.fsh overlay.fsh phosphor.fsh scan_pincushion.fsh sobel.fsh wobble.fsh texts credits.txt end.txt splashes.txt textures blocks fire_layer_0.png.mcmeta fire_layer_1.png.mcmeta lava_flow.png.mcmeta lava_still.png.mcmeta portal.png.mcmeta water_flow.png.mcmeta water_still.png.mcmeta anvil_base.png anvil_top_damaged_0.png anvil_top_damaged_1.png anvil_top_damaged_2.png beacon.png bed_feet_end.png bed_feet_side.png bed_feet_top.png bed_head_end.png bed_head_side.png bed_head_top.png bedrock.png bookshelf.png brewing_stand_base.png brewing_stand.png brick.png cactus_bottom.png cactus_side.png cactus_top.png cake_bottom.png cake_inner.png cake_side.png cake_top.png carrots_stage_0.png carrots_stage_1.png carrots_stage_2.png carrots_stage_3.png cauldron_bottom.png cauldron_inner.png cauldron_side.png cauldron_top.png clay.png coal_block.png coal_ore.png cobblestone_mossy.png cobblestone.png cocoa_stage_0.png cocoa_stage_1.png cocoa_stage_2.png command_block.png comparator_off.png comparator_on.png crafting_table_front.png crafting_table_side.png crafting_table_top.png daylight_detector_side.png daylight_detector_top.png deadbush.png destroy_stage_0.png destroy_stage_1.png destroy_stage_2.png destroy_stage_3.png destroy_stage_4.png destroy_stage_5.png destroy_stage_6.png destroy_stage_7.png destroy_stage_8.png destroy_stage_9.png diamond_block.png diamond_ore.png dirt_podzol_side.png dirt_podzol_top.png dirt.png dispenser_front_horizontal.png dispenser_front_vertical.png door_iron_lower.png door_iron_upper.png door_wood_lower.png door_wood_upper.png double_plant_fern_bottom.png double_plant_fern_top.png double_plant_grass_bottom.png double_plant_grass_top.png double_plant_paeonia_bottom.png double_plant_paeonia_top.png double_plant_rose_bottom.png double_plant_rose_top.png double_plant_sunflower_back.png double_plant_sunflower_bottom.png double_plant_sunflower_front.png double_plant_sunflower_top.png double_plant_syringa_bottom.png double_plant_syringa_top.png dragon_egg.png dropper_front_horizontal.png dropper_front_vertical.png emerald_block.png emerald_ore.png enchanting_table_bottom.png enchanting_table_side.png enchanting_table_top.png end_stone.png endframe_eye.png endframe_side.png endframe_top.png farmland_dry.png farmland_wet.png fern.png fire_layer_0.png fire_layer_1.png flower_allium.png flower_blue_orchid.png flower_dandelion.png flower_houstonia.png flower_oxeye_daisy.png flower_paeonia.png flower_pot.png flower_rose.png flower_tulip_orange.png flower_tulip_pink.png flower_tulip_red.png flower_tulip_white.png furnace_front_off.png furnace_front_on.png furnace_side.png furnace_top.png glass_black.png glass_blue.png glass_brown.png glass_cyan.png glass_gray.png glass_green.png glass_light_blue.png glass_lime.png glass_magenta.png glass_orange.png glass_pane_top_black.png glass_pane_top_blue.png glass_pane_top_brown.png glass_pane_top_cyan.png glass_pane_top_gray.png glass_pane_top_green.png glass_pane_top_light_blue.png glass_pane_top_lime.png glass_pane_top_magenta.png glass_pane_top_orange.png glass_pane_top_pink.png glass_pane_top_purple.png glass_pane_top_red.png glass_pane_top_silver.png glass_pane_top_white.png glass_pane_top_yellow.png glass_pane_top.png glass_pink.png glass_purple.png glass_red.png glass_silver.png glass_white.png glass_yellow.png glass.png glowstone.png gold_block.png gold_ore.png grass_side_overlay.png grass_side_snowed.png grass_side.png grass_top.png gravel.png hardened_clay_stained_black.png hardened_clay_stained_blue.png hardened_clay_stained_brown.png hardened_clay_stained_cyan.png hardened_clay_stained_gray.png hardened_clay_stained_green.png hardened_clay_stained_light_blue.png hardened_clay_stained_lime.png hardened_clay_stained_magenta.png hardened_clay_stained_orange.png hardened_clay_stained_pink.png hardened_clay_stained_purple.png hardened_clay_stained_red.png hardened_clay_stained_silver.png hardened_clay_stained_white.png hardened_clay_stained_yellow.png hardened_clay.png hay_block_side.png hay_block_top.png hopper_inside.png hopper_outside.png hopper_top.png ice_packed.png ice.png iron_bars.png iron_block.png iron_ore.png itemframe_background.png jukebox_side.png jukebox_top.png ladder.png lapis_block.png lapis_ore.png lava_flow.png lava_still.png leaves_acacia_opaque.png leaves_acacia.png leaves_big_oak_opaque.png leaves_big_oak.png leaves_birch_opaque.png leaves_birch.png leaves_jungle_opaque.png leaves_jungle.png leaves_oak_opaque.png leaves_oak.png leaves_spruce_opaque.png leaves_spruce.png lever.png log_acacia_top.png log_acacia.png log_big_oak_top.png log_big_oak.png log_birch_top.png log_birch.png log_jungle_top.png log_jungle.png log_oak_top.png log_oak.png log_spruce_top.png log_spruce.png melon_side.png melon_stem_connected.png melon_stem_disconnected.png melon_top.png mob_spawner.png mushroom_block_inside.png mushroom_block_skin_brown.png mushroom_block_skin_red.png mushroom_block_skin_stem.png mushroom_brown.png mushroom_red.png mycelium_side.png mycelium_top.png nether_brick.png nether_wart_stage_0.png nether_wart_stage_1.png nether_wart_stage_2.png netherrack.png noteblock.png obsidian.png piston_bottom.png piston_inner.png piston_side.png piston_top_normal.png piston_top_sticky.png planks_acacia.png planks_big_oak.png planks_birch.png planks_jungle.png planks_oak.png planks_spruce.png portal.png potatoes_stage_0.png potatoes_stage_1.png potatoes_stage_2.png potatoes_stage_3.png prismarine_bricks.png prismarine_rough.png.mcmeta pumpkin_face_off.png pumpkin_face_on.png pumpkin_side.png pumpkin_stem_connected.png pumpkin_stem_disconnected.png pumpkin_top.png quartz_block_bottom.png quartz_block_chiseled_top.png quartz_block_chiseled.png quartz_block_lines_top.png quartz_block_lines.png quartz_block_side.png quartz_block_top.png quartz_ore.png rail_activator_powered.png rail_activator.png rail_detector_powered.png rail_detector.png rail_golden_powered.png rail_golden.png rail_normal_turned.png rail_normal.png red_sand.png redstone_block.png redstone_dust_cross_overlay.png redstone_dust_cross.png redstone_dust_line_overlay.png redstone_dust_line.png redstone_lamp_off.png redstone_lamp_on.png redstone_ore.png redstone_torch_off.png redstone_torch_on.png reeds.png repeater_off.png repeater_on.png sand.png sandstone_bottom.png sandstone_carved.png sandstone_normal.png sandstone_smooth.png sandstone_top.png sapling_acacia.png sapling_birch.png sapling_jungle.png sapling_oak.png sapling_roofed_oak.png sapling_spruce.png sea_lantern.png sea_lantern.png.mcmeta slime.png snow.png soul_sand.png sponge.png stone_slab_side.png stone_slab_top.png stone.png stone_andesite.png stone_andesite_smooth.png stone_diorite.png stone_diorite_smooth.png stone_granite.png stone_granite_smooth.png stonebrick_carved.png stonebrick_cracked.png stonebrick_mossy.png stonebrick.png tallgrass.png tnt_bottom.png tnt_side.png tnt_top.png torch_on.png trapdoor.png trip_wire_source.png trip_wire.png vine.png water_flow.png water_still.png waterlily.png web.png wheat_stage_0.png wheat_stage_1.png wheat_stage_2.png wheat_stage_3.png wheat_stage_4.png wheat_stage_5.png wheat_stage_6.png wheat_stage_7.png wool_colored_black.png wool_colored_blue.png wool_colored_brown.png wool_colored_cyan.png wool_colored_gray.png wool_colored_green.png wool_colored_light_blue.png wool_colored_lime.png wool_colored_magenta.png wool_colored_orange.png wool_colored_pink.png wool_colored_purple.png wool_colored_red.png wool_colored_silver.png wool_colored_white.png wool_colored_yellow.png colormap foliage.png grass.png effect dither.png entity cat black.png ocelot.png red.png siamese.png chest christmas_double.png christmas.png ender.png normal_double.png normal.png trapped_double.png trapped.png cow cow.png mooshroom.png creeper creeper_armor.png creeper.png endercrystal endercrystal_beam.png endercrystal.png enderdragon dragon_exploding.png dragon_eyes.png dragon.png enderman enderman_eyes.png enderman.png ghast ghast_shooting.png ghast.png horse armor horse_armor_diamond.png horse_armor_gold.png horse_armor_iron.png donkey.png horse_black.png horse_brown.png horse_chestnut.png horse_creamy.png horse_darkbrown.png horse_gray.png horse_markings_blackdots.png horse_markings_white.png horse_markings_whitedots.png horse_markings_whitefield.png horse_skeleton.png horse_white.png horse_zombie.png mule.png pig pig_saddle.png pig.png sheep sheep_fur.png sheep.png skeleton skeleton.png wither_skeleton.png slime magmacube.png slime.png spider cave_spider.png spider.png villager butcher.png farmer.png librarian.png priest.png smith.png villager.png wither wither_armor.png wither_invulnerable.png wither.png wolf wolf_angry.png wolf_collar.png wolf_tame.png wolf.png zombie zombie_villager.png zombie.png arrow.png bat.png beacon_beam.png blaze.png boat.png chicken.png enchanting_table_book.png end_portal.png experience_orb.png explosion.png iron_golem.png lead_knot.png minecart.png sign.png silverfish.png snowman.png spider_eyes.png squid.png steve.png witch.png zombie_pigman.png environment clouds.png end_sky.png moon_[hases.png rain.png snow.png sun.png font ascii_sga.png ascii.png unicode_page_00.png unicode_page_0a.png unicode_page_0b.png unicode_page_0c.png unicode_page_0d.png unicode_page_0e.png unicode_page_0f.png unicode_page_01.png unicode_page_1a.png unicode_page_1b.png unicode_page_1c.png unicode_page_1d.png unicode_page_1e.png unicode_page_1f.png unicode_page_02.png unicode_page_2a.png unicode_page_2b.png unicode_page_2c.png unicode_page_2d.png unicode_page_2e.png unicode_page_2f.png unicode_page_03.png unicode_page_3a.png unicode_page_3b.png unicode_page_3c.png unicode_page_3d.png unicode_page_3e.png unicode_page_3f.png unicode_page_04.png unicode_page_4a.png unicode_page_4b.png unicode_page_4c.png unicode_page_4d.png unicode_page_4e.png unicode_page_4f.png unicode_page_05.png unicode_page_5a.png unicode_page_5b.png unicode_page_5c.png unicode_page_5d.png unicode_page_5e.png unicode_page_5f.png unicode_page_06.png unicode_page_6a.png unicode_page_6b.png unicode_page_6c.png unicode_page_6d.png unicode_page_6e.png unicode_page_6f.png unicode_page_07.png unicode_page_7a.png unicode_page_7b.png unicode_page_7c.png unicode_page_7d.png unicode_page_7e.png unicode_page_7f.png unicode_page_8a.png unicode_page_8b.png unicode_page_8c.png unicode_page_8d.png unicode_page_8e.png unicode_page_8f.png unicode_page_09.png unicode_page_9a.png unicode_page_9b.png unicode_page_9c.png unicode_page_9d.png unicode_page_9e.png unicode_page_9f.png unicode_page_10.png unicode_page_11.png unicode_page_12.png unicode_page_13.png unicode_page_14.png unicode_page_15.png unicode_page_16.png unicode_page_17.png unicode_page_18.png unicode_page_19.png unicode_page_20.png unicode_page_21.png unicode_page_22.png unicode_page_23.png unicode_page_24.png unicode_page_25.png unicode_page_26.png unicode_page_27.png unicode_page_28.png unicode_page_29.png unicode_page_30.png unicode_page_31.png unicode_page_32.png unicode_page_33.png unicode_page_34.png unicode_page_35.png unicode_page_36.png unicode_page_37.png unicode_page_38.png unicode_page_39.png unicode_page_40.png unicode_page_41.png unicode_page_42.png unicode_page_43.png unicode_page_44.png unicode_page_45.png unicode_page_46.png unicode_page_47.png unicode_page_48.png unicode_page_49.png unicode_page_50.png unicode_page_51.png unicode_page_52.png unicode_page_53.png unicode_page_54.png unicode_page_55.png unicode_page_56.png unicode_page_57.png unicode_page_58.png unicode_page_59.png unicode_page_60.png unicode_page_61.png unicode_page_62.png unicode_page_63.png unicode_page_64.png unicode_page_65.png unicode_page_66.png unicode_page_67.png unicode_page_68.png unicode_page_69.png unicode_page_70.png unicode_page_71.png unicode_page_72.png unicode_page_73.png unicode_page_74.png unicode_page_75.png unicode_page_76.png 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unicode_page_bb.png unicode_page_bc.png unicode_page_bd.png unicode_page_be.png unicode_page_bf.png unicode_page_c0.png unicode_page_c1.png unicode_page_c2.png unicode_page_c3.png unicode_page_c4.png unicode_page_c5.png unicode_page_c6.png unicode_page_c7.png unicode_page_c8.png unicode_page_c9.png unicode_page_ca.png unicode_page_cb.png unicode_page_cc.png unicode_page_cd.png unicode_page_ce.png unicode_page_cf.png unicode_page_d0.png unicode_page_d1.png unicode_page_d2.png unicode_page_d3.png unicode_page_d4.png unicode_page_d5.png unicode_page_d6.png unicode_page_d7.png unicode_page_f9.png unicode_page_fa.png unicode_page_fb.png unicode_page_fc.png unicode_page_fd.png unicode_page_fe.png unicode_page_ff.png gui achievement achievement_background.png achievement_icons.png container creative_inventory tab_inventory.png tab_item_search.png tab_items.png tabs.png anvil.png beacon.png brewing_stand.png crafting_table.png dispenser.png enchanting_table.png furnace.png generic_54.png hopper.png horse.png inventory.png stats_icons.png villager.png title background panorama_0.png panorama_1.png panorama_2.png panorama_3.png panorama_4.png panorama_5.png minecraft.png mojang.png book.png demo_background.png icons.png options_background.png resource_packs.png stream_indicator.png widgets.png items clock.png.mcmeta compass.png.mcmeta apple_golden.png apple.png arrow.png bed.png beef_cooked.png beef_raw.png blaze_powder.png blaze_rod.png boat.png bone.png book_enchanted.png book_normal.png book_writable.png book_written.png bow_pulling_0.png bow_pulling_1.png bow_pulling_2.png bow_standby.png bowl.png bread.png brewing_stand.png brick.png bucket_empty.png bucket_lava.png bucket_milk.png bucket_water.png cake.png carrot_golden.png carrot_on_a_stick.png carrot.png cauldron.png chainmail_boots.png chainmail_chestplate.png chainmail_helmet.png chainmail_leggings.png charcoal.png chicken_cooked.png chicken_raw.png clay_ball.png clock.png coal.png comparator.png compass.png cookie.png diamond_axe.png diamond_boots.png diamond_chestplate.png diamond_helmet.png diamond_hoe.png diamond_horse_armor.png diamond_leggings.png diamond_pickaxe.png diamond_shovel.png diamond_sword.png diamond.png door_iron.png vdoor_wood.png dye_powder_black.png dye_powder_blue.png dye_powder_brown.png dye_powder_cyan.png dye_powder_gray.png dye_powder_green.png dye_powder_light_blue.png dye_powder_lime.png dye_powder_magenta.png dye_powder_orange.png dye_powder_pink.png dye_powder_purple.png dye_powder_red.png dye_powder_silver.png dye_powder_white.png dye_powder_yellow.png egg.png emerald.png empty_armor_slot_boots.png empty_armor_slot_chestplate.png empty_armor_slot_helmet.png empty_armor_slot_leggings.png ender_eye.png ender_pearl.png experience_bottle.png feather.png fireball.png fireworks_charge_overlay.png fireworks_charge.png fireworks.png fish_clownfish_raw.png fish_cod_cooked.png fish_cod_raw.png fish_pufferfish_raw.png fish_salmon_cooked.png fish_salmon_raw.png fishing_rod_cast.png fishing_rod_uncast.png flint_and_steel.png flint.png flower_pot.png ghast_tear.png glowstone_dust.png gold_axe.png gold_boots.png gold_chestplate.png gold_helmet.png gold_hoe.png gold_horse_armor.png gold_ingot.png gold_leggings.png gold_nugget.png gold_pickaxe.png gold_shovel.png gold_sword.png gunpowder.png hopper.png iron_axe.png iron_boots.png iron_chestplate.png iron_helmet.png iron_hoe.png iron_horse_armor.png iron_ingot.png iron_leggings.png iron_pickaxe.png iron_shovel.png iron_sword.png item_frame.png lead.png leather_boots_overlay.png leather_boots.png leather_chestplate_overlay.png leather_chestplate.png leather_helmet_overlay.png leather_helmet.png leather_leggings_overlay.png leather_leggings.png leather.png magma_cream.png map_empty.png map_filled.png melon_speckled.png melon.png minecart_chest.png minecart_command_block.png minecart_furnace.png minecart_hopper.png minecart_normal.png minecart_tnt.png mushroom_stew.png name_tag.png nether_star.png nether_wart.png netherbrick.png painting.png paper.png porkchop_cooked.png porkchop_raw.png potato_baked.png potato_poisonous.png potato.png potion_bottle_drinkable.png potion_bottle_empty.png potion_bottle_splash.png potion_overlay.png pumpkin_pie.png quartz.png quiver.png record_11.png record_13.png record_blocks.png record_cat.png record_chirp.png record_far.png record_mall.png record_mellohi.png record_stal.png record_strad.png record_wait.png record_ward.png redstone_dust.png reeds.png repeater.png rotten_flesh.png ruby.png saddle.png seeds_melon.png seeds_pumpkin.png seeds_wheat.png shears.png sign.png skull_creeper.png skull_skeleton.png skull_steve.png skull_wither.png skull_zombie.png slimeball.png snowball.png spawn_egg_overlay.png spawn_egg.png spider_eye_fermented.png spider_eye.png stick.png stone_axe.png stone_hoe.png stone_pickaxe.png stone_shovel.png stone_sword.png string.png sugar.png wheat.png wood_axe.png wood_hoe.png wood_pickaxe.png wood_shovel.png wood_sword.png map map_background.png map_icons.png misc enchanted_item_glint.png.mcmeta pumpkinblur.png.mcmeta shadow.png.mcmeta vignette.png.mcmeta enchanted_item_glint.png pumpkinblur.png shadow.png underwater.png unknown_pack.png vignette.png models armor chainmail_layer_1.png chainmail_layer_2.png diamond_layer_1.png diamond_layer_2.png gold_layer_1.png gold_layer_2.png iron_layer_1.png iron_layer_2.png leather_layer_1_overlay.png leather_layer_1.png leather_layer_2_overlay.png leather_layer_2.png painting paintings_kristoffer_zetterstrand.png particle footprint.png particles.png META-INF MANIFEST.MF MOJANGCS.RSA MOJANGCS.SF net minecraft client main realms server