class Price

1 interface PriceParams {
2     public static final int CHILDRENS = 2;
3     public static final int REGULAR = 0;
4     public static final int NEW_RELEASE = 1;
5 }
6 
7 class ChildrensPrice extends Price {
8     int getPriceCode() 
9     {
10 	return CHILDRENS;
11     }
12 }
13 
14 class NewReleasePrice extends Price {
15     int getPriceCode() 
16     {
17 	return NEW_RELEASE;
18     }
19 }
20 
21 class RegularPrice extends Price {
22     int getPriceCode() 
23     {
24 	return REGULAR;
25     }
26 }
27 
28 abstract class Price implements PriceParams{
29     abstract int getPriceCode();
30     public static Price getInstance(int priceCode) 
31     {
32 	Price result = null;
33 	switch (priceCode) {
34 	case CHILDRENS:
35 	    result = new ChildrensPrice();
36 	    break;
37 	case REGULAR:
38 	    result = new RegularPrice();
39 	    break;
40 	case NEW_RELEASE:
41 	    result = new NewReleasePrice();
42 	    break;
43 	default:
44 	    throw new IllegalArgumentException();
45 	}
46 	return result;
47     }
48 }
49