public class Jukebox {
    public void play(Tune t) {
        Guitar g = new Guitar();
        g.play(t);
    }
}
 
public class Guitar {
    public void play(Tune t) {
        //play the tune
    }
}

public class Jukebox {
    public void play(Tune t) {
        MusicalPlayer mp = createMusicalPlayer();
        mp.play(t);
    }
}

public class Jukebox {
    public void play(Tune t, int selection) {
        if(selection = GUITAR)
            Guitar g = new Guitar();
            g.play(t);
        }
        else if(selection == PIANO) {
            Piano p = new Piano();
            p.play(t);
        }
    }
}
 
public class Guitar {
    public void play(Tune t) {
        //play the tune
    }
}
 
public class Piano {
    public void play(Tune t) {
        //play the tune
    }
}

public class Jukebox {
    public void play(Tune t, int selection) {
        MusicalInstrument mp = createMusicalInstrument(selection)
        mp.play
    }
    
    private MusicalInstrument createMusicalInstrument(int selection) {
        //create an appropriate instance of MusicaInstrument
    }
}
 
public abstract class MusicalPlayer {
    public abstract void play();
}
 
public class Guitar extends MusicalInstrument {
    public void play(Tune t) {
        //play the tune
    }
}
 
public class Piano extends MusicalInstrument {
    public void play(Tune t) {
        //play the tune
    }
}