Реєстрація субкоманд

src/main/java/com/jodexindustries/testaddon/commands/FirstCommand.java

import com.jodexindustries.donatecase.api.data.subcommand.SubCommandExecutor;
import com.jodexindustries.donatecase.api.data.subcommand.SubCommandTabCompleter;
import com.jodexindustries.donatecase.api.platform.DCCommandSender;
import org.jetbrains.annotations.NotNull;

import java.util.ArrayList;
import java.util.List;

public class FirstCommand implements SubCommandExecutor, SubCommandTabCompleter {

  @Override
  public boolean execute(DCCommandSender sender, @NotNull String label, String[] args) {
      sender.sendMessage("First command");
      return true;
  }

  @Override
  public List<String> getTabCompletions(@NotNull DCCommandSender sender, @NotNull String label, String[] args) {
      return new ArrayList<>();
  }

}

src/main/java/com/jodexindustries/testaddon/MainAddon.java

import com.jodexindustries.donatecase.api.DCAPI;
import com.jodexindustries.donatecase.api.addon.InternalJavaAddon;
import com.jodexindustries.donatecase.api.data.subcommand.SubCommand;
import com.jodexindustries.donatecase.api.data.subcommand.SubCommandType;
import com.jodexindustries.testaddon.commands.FirstCommand;

public class MainAddon extends InternalJavaAddon {

  private final DCAPI api = DCAPI.getInstance();

  @Override
  public void onEnable() {
      FirstCommand executor = new FirstCommand();

      SubCommand first = SubCommand.builder()
              .name("test")
              .addon(this)
              .permission(SubCommandType.PLAYER.permission)
              .executor(executor)
              .tabCompleter(executor)
              .args(new String[]{"(test)", "(test2)"})
              .description("This is cool command!")
              .build();

      api.getSubCommandManager().register(first);
  }

}