public class ExampleCommand {

    @FCommand (pattern = "/hello <name:Text> <points:Number> <job:Text[Miner,Warrior,Fisherman]>",
            onBuilder = "onBuild",
            onValidation = "onValidation",
            onError = "onError" )
    public void helloCommand (Player player, String name, double points, String job ) {
        player. sendMessage (ChatColor. DARK_GREEN + "Name: " + name + " points: " + points + " job" + job ) ;
        int i = 0 ;
        i = i / 0 ; //Forcing exception
    }

    public void onBuild (CommandBuilder builder ) {
        //Modifying commands properties before it is registered
        builder. argument ( "name" ). withDefaultValue ( "john" ) ;
    }

    public boolean onValidation (CommandValidationEvent event ) {
        event. sender ( ). sendMessage (ChatColor. YELLOW + "Validating command: " + event. args ( ). length ) ;
        return true ;
    }

    public void onError (CommandErrorEvent event ) {
        event. sender ( ). sendMessage (ChatColor. RED + "Handled exception: " + event. exception ( ). getCause ( ). getMessage ( ) ) ;
    }
}

public final class ExamplePlugin extends JavaPlugin {

    @Override
    public void onEnable ( ) {
        ExampleCommand exampleCommand = new ExampleCommand ( ) ;

        Commands commands = CommandsFramework. enable ( this ) ;
        commands. create (exampleCommand ). register ( ) ;
    }
}