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Posted By

cetnar on 07/15/06


Tagged

tiger enum map


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xaviaracil


Maps of Enums

Published in: Java 

EnumMap protects you from mis-ordering when initializing values, reordering in the enumerated type, and just about any other strange situation that can arise from more than one person working on code at the same time.

Plain TextExpand 
  1. public enum AntStatus {
  2.  
  3.   INITIALIZING,
  4.  
  5.   COMPILING,
  6.  
  7.   COPYING,
  8.  
  9.   JARRING,
  10.  
  11.   ZIPPING,
  12.  
  13.   DONE,
  14.  
  15.   ERROR
  16.  
  17. }
  18.  
  19.  
  20.    public void testEnumMap(PrintStream out) throws IOException {
  21.  
  22.        // Create a map with the key and a String message
  23.  
  24.        EnumMap<AntStatus, String> antMessages =
  25.  
  26.          new EnumMap<AntStatus, String>(AntStatus.class);
  27.  
  28.  
  29.  
  30.        // Initialize the map
  31.  
  32.        antMessages.put(AntStatus.INITIALIZING, "Initializing Ant...");
  33.  
  34.        antMessages.put(AntStatus.COMPILING,    "Compiling Java classes...");
  35.  
  36.        antMessages.put(AntStatus.COPYING,      "Copying files...");
  37.  
  38.        antMessages.put(AntStatus.JARRING,      "JARring up files...");
  39.  
  40.        antMessages.put(AntStatus.ZIPPING,      "ZIPping up files...");
  41.  
  42.        antMessages.put(AntStatus.DONE,         "Build complete.");
  43.  
  44.        antMessages.put(AntStatus.ERROR,        "Error occurred.");
  45.  
  46.  
  47.  
  48.        // Iterate and print messages
  49.  
  50.        for (AntStatus status : AntStatus.values( ) ) {
  51.  
  52.          out.println("For status " + status + ", message is: " +
  53.  
  54.                      antMessages.get(status));
  55.  
  56.        }
  57.  
  58.      }

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