1    /* 
2     * StringSwitch.java 
3     * 
4     * Created on October 30, 2002, 1:18 PM 
5     */ 
6     
7    package bookExamples.ch05ControlStructs; 
8     
9     
10   import java.util.HashMap; 
11   import java.util.Map; 
12    
13   /** 
14    *  StringSwitch class - shows how to build a class 
15    *  that supports switch based on strings. 
16    *  @author Thomas Rowland and Douglas A. Lyon 
17    *  @version October 30, 2002, 1:18 PM 
18    */ 
19   class StringSwitch { 
20    
21       /** Map used to store String-int mappings and provide fast lookup */ 
22       private Map map = new HashMap(); 
23    
24       /** 
25        *  Adds a key-value pair to the hashmap. 
26        *  Map.put provides constant-time performance. 
27        *  @param key the key object, which is a String 
28        *  @param value the value, which is an int 
29        */ 
30       protected final void add(String key, final int value) { 
31           map.put(key, new Integer(value)); 
32       } 
33    
34       /** 
35        *  Retrieves a value from the hashmap give the key. 
36        *  Map.put provides constant-time performance. 
37        *  @param key the key object, which is a String 
38        *  @return the value to which the key is mapped 
39        */ 
40       protected int getIdForString(String key) { 
41           return ((Integer) map.get(key)).intValue(); 
42       } 
43   }//class 
44