Java Programming Tutorial - 43 - Composition

public class apples {
   public static void main (String[] args){
      potpie potObject = new potpie(4,5,6);
      tuna tunaObject = new tuna("Bucky", potObject);

      System.out.println(tunaObject);
   }
}

public class tuna {
   private String name;
   private potpie birthday;

   public tuna(String theName, potpie theDate){
      name = theName;
      birthday = theDate;
   }

   public String toString(){
      return String.format("My name is %s, my birthday is %s", name, birthday);
   }
}

public class potpie {
   public int month;
   public int day;
   public int year;

   public potpie(int m, int d, int y){
      month = m;
      day = d;
      year = y;

      System.out.printf("The constructor for this is %s\n", this);
   }

   public String toString(){
      return String.format("%d/%d/%d", month, day, year);
   }
}