Environment arguments

The EnvironmentArgument class allows a command sender to refer to a specific world environment, declared in Bukkit's World.Environment class. This includes the following three environments: NORMAL, NETHER and THE_END.

Note:

The EnvironmentArgument is only supported in Minecraft versions 1.13.1 and later, meaning it will not work on Minecraft 1.13. This is due to fact that Minecraft added the environment argument in 1.13.1. Attempting to use the EnvironmentArgument on Minecraft 1.13 will throw an EnvironmentArgumentException.

Example - Creating a new world

Say we want to create a new world on our Minecraft server. To do this, we need to know the name of the world, and the type (i.e. overworld, nether or the end). As such, we want to create a command with the following structure:

/createworld <worldname> <type>

Using the world name and the environment of the world, we can use Bukkit's WorldCreator to create a new world that matches our provided specifications:

// Declare our arguments
LinkedHashMap<String, Argument> arguments = new LinkedHashMap<>();
arguments.put("worldname", new StringArgument());
arguments.put("type", new EnvironmentArgument());

new CommandAPICommand("createworld")
    .withArguments(arguments)
    .executes((sender, args) -> {
        String worldName = (String) args[0];
        Environment environment = (Environment) args[1];

        // Create a new world with the specific world name and environment
        Bukkit.getServer().createWorld(new WorldCreator(worldName).environment(environment));
        sender.sendMessage("World created!");
    })
    .register();