//Example: has-a relationship

public class Freshman{
    private String name;
    private DormRoom room; 
    
    public Freshman(String n, DormRoom r){
        name = n;
        room = r;
    }
    
    public String getName(){ 
        return name;
    }  
    public DormRoom getRoom(){ 
        return room;
    }
    
    public void changeRoom(DormRoom r){
        //complete
       room = r;
    }
    
    public boolean hasARoom(){
       //complete
       return (room != null); 
    }
    
    public String address(){
        //complete
        if(room != null){
            return room.getLocation();
        }
        else{
            return "no room";
        }
    }
   
}