public abstract class CommandExecutor {

  private final String command, permission; // you can group variables of the same type together like this
  private final boolean console, player;
  private final int length;

  /*
  Instantiating the variables inside of the constructor instead of using a setter. If you do not want all of these
  to be set (e.g. if some are optional) you can have multiple constructors.
  */
  public CommandExecutor(String command, String permission, boolean console, boolean player, int length) {
    this.command = command;
    this.permission = permission;
    this.console = console;
    this.player = player;
    this.length = length;
  }

  // you know what this does
  public abstract void onCommand(CommandSender sender, Command cmd, String label, String[] args);

  public String getCommand() {
    return this.command; // using the "this" operater in getters is just a personal preference of mine.
  }

  public String getPermission() {
    return this.permission;
  }

  public boolean isConsole() {
    return this.console;
  }

  public boolean isPlayer() {
    return this.player;
  }

  public int getLength() {
    return this.length;
  }

}