move to the right

public class Main extends JavaPlugin implements Listener {

    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
    }

    @EventHandler
    public void onRightClick(PlayerInteractEvent e) {
//      if (e.getAction() == Action.RIGHT_CLICK_AIR) {
//          Vector v = e.getPlayer().getLocation().getDirection();
//          e.getPlayer().sendMessage(v.length() + "");
//
//          v = v.multiply(1.5);
//          e.getPlayer().sendMessage(String.format("x=%s, y=%s, z=%s, length=%s",
//                  v.getX(), v.getY(), v.getZ(), v.length()));
//          e.getPlayer().setVelocity(v);
//      }

        double angle = Math.toRadians(e.getPlayer().getLocation().getYaw());

        if (e.getAction() == Action.RIGHT_CLICK_AIR) {
            angle += Math.PI;
            double r = 1;
            Vector v = new Vector(r * Math.cos(angle), 0, r * Math.sin(angle));
            e.getPlayer().setVelocity(v);
        }
    }
}