Minecraft:Client.json

Template:Lowercase Template:Exclusive

Template:Mono is the file that accompanies Template:Mono in Minecraft:.minecraft/versions/<version> and lists the version's attributes. When using the latest version of the Minecraft:Minecraft Launcher, it is named Template:Mono (e.g., Template:Mono). The JSON file for specific versions is located in the Template:Mono file.

JSON format

This is the JSON format for Template:Mono.

Template:Nbt The root tag.
- Template:Nbt:
  - Template:Nbt: Contains arguments supplied to the game, such as information about the username and the version.
    - Template:Nbt An argument.
    - Template:Nbt A conditional argument.
      - Template:Nbt: A list of rules.
        Template:Nbt A rule.
        Template:Nbt: One of "allow" or "disallow".
        
        Template:Nbt: Includes a set of features that can be checked.
        Template:Nbt: Appears only in the first appearance of the compound tag.
        
        Template:Nbt: Appears only in the second appearance of the compound tag.
        
        Template:Nbt: Appears only in the third appearance of the compound tag.
        
        Template:Nbt: Appears only in the fourth appearance of the compound tag.
        
        Template:Nbt: Appears only in the fifth appearance of the compound tag.
        
        Template:Nbt: Appears only in the sixth appearance of the compound tag.
      - Template:Nbt Template:Nbt: An argument or a list of arguments that is added when the condition is matched.
  - Template:Nbt: Contains JVM arguments, such as information about memory allocation, garbage collector selection, or environment variables.
    - Template:Nbt: A conditional argument.
      - Template:Nbt: A list of rules.
        Template:Nbt: A rule.
        Template:Nbt: One of "allow" or "disallow".
        
        Template:Nbt: The launcher can detect this, but it's currently unused.
        
        Template:Nbt:
        Template:Nbt: One of "windows", "osx" or "linux".
        
        Template:Nbt: Contains a regex<ref group="note">Template:Cite</ref> intended to be checked against System.getProperty("os.version").
        
        Template:Nbt: Appears only in the fourth appearance of the compound tag. Its value is "x86".
      - Template:Nbt Template:Nbt: An argument or a list of arguments that is added when the condition is matched.
- Template:Nbt:
  - Template:Nbt: The assets version.
  - Template:Nbt: The SHA1 hash of the assets file.
  - Template:Nbt: The size of the version.
  - Template:Nbt: The total size of the version.
  - Template:Nbt: The URL that the game should visit to download the assets.
- Template:Nbt: The assets version.
- Template:Nbt: 0 until Minecraft:1.16.4-pre2, and 1 for all versions after. A value of 0 causes the official launcher to warn the player about missing player safety features when this version is selected.
- Template:Nbt:
  - Template:Nbt: The Minecraft:client.jar download information.
    - Template:Nbt: The SHA1 hash of the jar.
    - Template:Nbt: The size of the jar in bytes.
    - Template:Nbt: The URL the launcher should visit to download the file.
  - Template:Nbt: The obfuscation maps for this client version. Added in Minecraft:Java Edition 19w36a but got included in 1.14.4 also. Repeats the structure of the client download information.
  - Template:Nbt: The server download information. Repeats the structure of the client download information.
  - Template:Nbt: The obfuscation maps for this server version. Added in Minecraft:Java Edition 19w36a but got included in 1.14.4 also. Repeats the structure of the client download information.
  - Template:Nbt: The Windows server download information. Removed in Minecraft:Java Edition 16w05a, but is still present in prior versions. Repeats the structure of the client download information.
- Template:Nbt: The name of this version client (e.g. 1.14.4).
- Template:Nbt:
  - Template:Nbt: The build of OpenJDK to download and use with the game. Its value is "jre-legacy" until Minecraft:21w18a, "java-runtime-alpha" until Minecraft:1.18-pre1, "java-runtime-beta" until Minecraft:22w17a, "java-runtime-gamma" until Minecraft:24w13a, "java-runtime-delta" until Minecraft:1.21.11, and "java-runtime-epsilon" since Minecraft:26.1 Snapshot 1.
  - Template:Nbt: The version of the Java Runtime Environment to use. Its value is 8 until Minecraft:21w18a, 16 until Minecraft:1.18-pre1, 17 until Minecraft:24w13a, 21 until Minecraft:1.21.11, and 25 since Minecraft:26.1 Snapshot 1.
- Template:Nbt: A list of libraries.
  - Template:Nbt: A library.
    - Template:Nbt: The library's download information.
      - Template:Nbt: Info about the artifact.
        Template:Nbt: Path to store the downloaded artifact, relative to the "libraries" directory in Minecraft:.minecraft.
        
        Template:Nbt: The SHA1 hash of the file.
        
        Template:Nbt: The size of the file in bytes.
        
        Template:Nbt: The URL that the game should visit to download the file.
      - Template:Nbt: Appears only for some libraries.
        Template:Nbt: Specifies the artifact information for the artifact with this specific classifier. Repeats the artifact structure above.
    - Template:Nbt: A maven name for the library, in the form of "groupId:artifactId:version".
    - Template:Nbt: The URL of the Maven repository (used by Forge).
    - Template:Nbt: Information about native libraries (in C) bundled with this library. Appears only when there are classifiers for natives.
      - Template:Nbt: This tag's name depends on the natives that appear in the classifiers, it will be one of "windows", "osx" or "linux".
    - Template:Nbt: Rules to follow when extracting natives from a library.
      - Template:Nbt: Paths to exclude.
        Template:Nbt: Its value is "META-INF/".
    - Template:Nbt: Contains a compound with the tags "action" and "os", as shown above.
- Template:Nbt: Information about Log4j log configuration.
  - Template:Nbt:
    - Template:Nbt: The JVM argument for adding the log configuration. Its value is "-Dlog4j.configurationFile=${path}".
    - Template:Nbt: The Log4j2 XML configuration used by this version for the launcher for launcher's log screen.
      - Template:Nbt: Its value is "client-1.12.xml", but may differ for older versions.<ref group=note>For instance, for Minecraft:Java Edition 1.10.2, the value is "client-1.7.xml".</ref>
      - Template:Nbt: The SHA1 hash for this file.
      - Template:Nbt: The size of this file in bytes.
      - Template:Nbt: The URL the launcher should visit to download the file.
    - Template:Nbt: Its value is "log4j2-xml".
- Template:Nbt: The main class.
- Template:Nbt: The minimum Launcher version that can run this version of the game.
- Template:Nbt: The release date-time in ISO-8601<ref group="note">https://www.iso.org/iso-8601-date-and-time-format.html</ref> extended offset format.
- Template:Nbt: Same as "releaseTime".
- Template:Nbt: The type of this game version. One of "release", "snapshot", "unobfuscated", "old_beta" or "old_alpha"

History

Template:HistoryTable

Notes

Template:Notelist

Navigation

Template:Navbox Java Edition technical

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