{{Infobox version
| title = Minecraft Alpha v1.2.3
| vernum = 1.2.3
| image = Alpha v1.2.3.png
| image2 = Alpha v1.2.3 menu.png
| server = [[Alpha server 0.2.5|0.2.5]]
| edition = java
| type = 
| date = November 24, 2010
| jsonhash = ccbea3f4157f75fdfcffd8573cc6e00e9b7229f5
| jsonfile = a1.2.3
| clienthash = f4be258122cb62208b350cd2068685ad859bb447
| prevparent = Alpha v1.2.0
| prev = Alpha v1.2.2
| next = Alpha v1.2.3_01
| nextparent = Beta 1.0
}}<onlyinclude>

'''Alpha v1.2.3''' is a version of [[Java Edition Alpha]] released with [[Alpha server 0.2.5|server 0.2.5]] on November 24, 2010.{{cn}}

== Additions ==
* The player's current coordinates are now shown in the [[debug screen]].
* [[Leaves]] now decay again.
* Added visible hurting animations for players and mobs in multiplayer.
* Added the ability to attack [[entities]] ([[mob]]s, [[boat]]s, [[minecart]]s, and players) in multiplayer.

== Fixes ==
* Fixed a crash related to lighting.{{cn}}
* Players in boats and minecarts now receive terrain updates.
</onlyinclude>

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

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[[fr:Historique des versions Java/Alpha#1.2.3]]
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[[pt:Edição Java Alpha v1.2.3]]
[[ru:Alpha v1.2.3 (Java Edition)]]
[[uk:Alpha v1.2.3 (Java Edition)]]
[[zh:Java版Alpha v1.2.3]]