Check which fragment is selected Android

I have a navigation view for which I use this switch to change my fragment depending on the item selected :

Fragment fragment = null;
        String title = getString(R.string.app_name);

        switch (viewId) {
            case R.id.nav_random:
                fragment = new Random();
                title = "RANDOM";

                break;
            case R.id.nav_podium:
                fragment = new Podium();
                title = "PODIUM";
                break;
            case R.id.nav_sport:
                fragment = new Sport();
                title = "SPORT";
                break;
            case R.id.nav_videogames:
                fragment = new Games();
                title = "GAMES";
                break;
            case R.id.nav_socialnetwork:
                fragment = new SocialNetwork();
                title = "SOCIAL NETWORKS";
                break;
            case R.id.nav_heart:
                fragment = new Heart();
                title = "FAVORITES";
                break;

        }

I want to check if the fragment selected is "Podium" or whichever else, how can I do that? I have tried something like if fragment == new Podium() or if fragment == Podium but I can't figure out how to check which fragment is selected and then displayed.