Question

Write Java classes CollectableItem and Coin defined by these UML

   diagrams . CollectableItem is the base class for the derived class Coin. If you wish, use

   IntelliJ to write the constructors, getters, setters, and toString

   methods.

   +---------------------------------------------------------------+

   |                 CollectableItem                               |

   +---------------------------------------------------------------+

   | - id : int                                                    |

   | - itemType : String                                           |

   | - price : double                                              |

   | - onSale : boolean                                            |

   +---------------------------------------------------------------+

   | + CollectableItem(id : int, itemType : String,                |

   |                   price : double, onSale : boolean)           |

   | + getItemType( ) : String                                     |

   | + getPrice( ) : double                                        |

   | + isOnSale( ) : boolean                                       |

   | + setOnSale(onSale : boolean)                                 |

   | + toString( ) : String                                        |

   +--------------------------------+------------------------------+

                                    ^

       (arrow means inherits from) |

                                    |

   +--------------------------------+------------------------------+

   |                  Coin                                         |

   +---------------------------------------------------------------+

   | - denomination( ) : String                                    |

   | - year( ) : int                                               |

   | - condition( ) : String                                       |

   +---------------------------------------------------------------+

   | + USCoin(itemType : String, price : double, onSale : boolean, |

   |          denonimation : int, year : int, condition : String) |          

   | + getDenomination( ) : String                                 |

   | + getYear( ) : int                                            |

   | + getCondition( ) : String                                    |

   | + toString( ) : String                                        |

   +---------------------------------------------------------------+

Complete the Test2 unit test class in the Test2.java

   source code file. Use assertEquals statements to test the specified Coin methods.

Answer 1

The implementation of above UML diagram to Class in java is Given Below:

• Class CollectableItem

 public class CollectableItem {      int id;         String itemType;        double price;   boolean onSale;                 // Constructor of CollectableItem Class         public CollectableItem(int id, String itemType, double price, boolean onSale) {                 super();                this.id = id;           this.itemType = itemType;               this.price = price;             this.onSale = onSale;   }               // getItemType( ) : String      public String getItemType() {           return itemType;        }               // getPrice( ) : double         public double getPrice() {              return price;   }       // isOnSale( ) : boolean        public boolean isOnSale() {             return onSale;  }               // setOnSale(onSale : boolean)  public void setOnSale(boolean onSale) {                 this.onSale = onSale;   }               // toString( ) : String                 @Override               public String toString() {                      return "CollectableItem [id=" + id + ", itemType=" + itemType + ", price=" + price + ", onSale=" + onSale + "]";                } }

• Class Coin

 class Coin extends CollectableItem{    String denomination;    int year;       String condition;               // Constructor of Coin Class   public Coin(int id, String itemType, double price, boolean onSale, String denomination, int year,                       String condition) {             super(id, itemType, price, onSale);                             this.denomination = denomination;               this.year = year;               this.condition = condition;             }               // getDenomination( ) : String  public String getDenomination() {               return denomination;    }               //getYear( ) : int      public int getYear() {          return year;    }               // getCondition( ) : String |   public String getCondition() {          return condition;       }               // toString( ) : String         @Override       public String toString() {              return "Coin [denomination=" + denomination + ", year=" + year + ", condition=" + condition + "]";      }        } 

• Class Test2 (This class conatains the working proof of above classes)

 public class Test2 {        public static void main(String[] args) {                                Coin c = new Coin(1, "Antique Coin", 1000, true, "$5", 1990, "Good");                           // getting condition of coin by calling getCondition()          System.out.println(c.getCondition());                           // getting denomination of coin by calling getDenomination()            System.out.println(c.getDenomination());                                // getting Year of manufacturing of Coin by calling getYear()           System.out.println(c.getYear());                                // setting the onSale to false          c.setOnSale(false);             // Checking if coin is available for sale               System.out.println(c.isOnSale());                                               // Getting the type of Item by calling getItemType()            System.out.println(c.getItemType());                            // calling toString Method              System.out.println(c.toString());                                       } } 

• Output