Is this a good Object Oriented Code?

Is there any object oriented way or design pattern I can use to make this code better. How can I avoid casting in bellow code? What if I add new Object like WaterTank how will it interact with Fitting?

Here are my code classes

Run.java

package main;

import fittings.Fitting;
import fittings.Tap;
import bathroom.Bathroom;
import user.User;

public class Run {

    public static void main(String[] args) {

        User rutvik = new User("rutvik");

        Bathroom bathroom = new Bathroom(rutvik);   

        bathroom.getBathroomFitting(Fitting.TAP).use(rutvik);

        ((Tap)bathroom.getBathroomFitting(Fitting.TAP)).controlSpeed();

    }

}

User.java

package user;

import bathroom.BathroomUser;

public class User implements BathroomUser {

    String userName;

    public User(String userName){
        System.out.println("constructing user... "+userName);
        this.userName=userName;
    }

    @Override
    public String getUserName(){
        return userName;
    }

}

Bathroom.java

package bathroom;

import java.util.ArrayList;
import user.User;
import fittings.Fitting;
import fittings.Tap;

public class Bathroom {

    BathroomUser user;  
    ArrayList<Fitting> fittings;

    public Bathroom(User user){
        System.out.println("constructing bathroom..."); 
        System.out.println("assigning user... " + user.getUserName()+" to bathroom");
        this.user=user;
        fittings=new ArrayList<Fitting>();
        fittings.add(new Tap());
    }

    public Fitting getBathroomFitting(int fittingType){
        for(Fitting fitting:fittings){
            if(fitting.getFittingType()==fittingType){
                return fitting;
            }
        }
        return null;
    }
}

BathroomUser.java

package bathroom;

public interface BathroomUser {

    public String getUserName();

}

Fittings.java

package fittings;

import bathroom.BathroomUser;

public abstract class Fitting {

    public static final int TAP=0;
    public static final int SHOWER=1;
    public static final int SINK=2;

    public abstract void use(BathroomUser user);

    public abstract int getFittingType();

}

Tap.java

package fittings;

import bathroom.BathroomUser;

public class Tap extends Fitting {

    public Tap() {
        System.out.println("constructing TAP fitting...");
    }

    @Override
    public int getFittingType() {
        return Fitting.TAP;
    }

    @Override
    public void use(BathroomUser user) {
        System.out.println("Tap is in use... by " + user.getUserName());
    }

    public void controlSpeed(){
        System.out.println("Tap Speed Changed");
    }
}