Money


1   package junit.samples.money;
2   
3   /**
4    * A simple Money.
5    *
6    */
7   public class Money implements IMoney {
8   
9       private int fAmount;
10      private String   fCurrency;
11  
12      /**
13       * Constructs a money from the given amount and currency.
14       */
15      public Money(int amount, String   currency) {
16          fAmount= amount;
17          fCurrency= currency;
18      }
19      /**
20       * Adds a money to this money. Forwards the request to the addMoney helper.
21       */
22      public IMoney add(IMoney m) {
23          return m.addMoney(this);
24      }
25      public IMoney addMoney(Money m) {
26          if (m.currency().equals(currency()) )
27              return new Money(amount()+m.amount(), currency());
28          return MoneyBag.create(this, m);
29      }
30      public IMoney addMoneyBag(MoneyBag s) {
31          return s.addMoney(this);
32      }
33      public int amount() {
34          return fAmount;
35      }
36      public String   currency() {
37          return fCurrency;
38      }
39      public boolean equals(Object   anObject) {
40          if (isZero()) 
41              if (anObject instanceof IMoney)
42                  return ((IMoney)anObject).isZero();
43          if (anObject instanceof Money) {
44              Money aMoney= (Money)anObject;
45              return aMoney.currency().equals(currency())
46                               && amount() == aMoney.amount();
47          }
48          return false;
49      }
50      public int hashCode() {
51          return fCurrency.hashCode()+fAmount;
52      }
53      public boolean isZero() {
54          return amount() == 0;
55      }
56      public IMoney multiply(int factor) {
57          return new Money(amount()*factor, currency());
58      }
59      public IMoney negate() {
60          return new Money(-amount(), currency());
61      }
62      public IMoney subtract(IMoney m) {
63          return add(m.negate());
64      }
65      public String   toString() {
66          StringBuffer   buffer = new StringBuffer  ();
67          buffer.append("["+amount()+" "+currency()+"]");
68          return buffer.toString();
69      }
70      public /*this makes no sense*/ void appendTo(MoneyBag m) {
71          m.appendMoney(this);
72      }
73  }
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags