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copied!<p>Using an <code>enum</code> to hold configurable values like this looks like an entirely wrong design. Enums are singletons, so effectively you can only have one configuration active at any given time.</p> <p>An <code>EnumMap</code> sounds more like what you need. It's external to the <code>enum</code>, so you can instantiate as many configurations as you need.</p> <pre><code>import java.util.*; public class EnumMapExample { static enum Options { DEBUG, ALWAYS_SAVE, THREAD_COUNT; } public static void main(String[] args) { Map<Options,Object> normalConfig = new EnumMap<Options,Object>(Options.class); normalConfig.put(Options.DEBUG, false); normalConfig.put(Options.THREAD_COUNT, 3); System.out.println(normalConfig); // prints "{DEBUG=false, THREAD_COUNT=3}" Map<Options,Object> debugConfig = new EnumMap<Options,Object>(Options.class); debugConfig.put(Options.DEBUG, true); debugConfig.put(Options.THREAD_COUNT, 666); System.out.println(debugConfig); // prints "{DEBUG=true, THREAD_COUNT=666}" } } </code></pre> <h3>API links</h3> <ul> <li><a href="http://java.sun.com/javase/6/docs/api/java/util/EnumMap.html" rel="nofollow noreferrer"><code>java.util.EnumMap</code></a> <blockquote> <p>A specialized <code>Map</code> implementation for use with <code>enum</code> type keys. All of the keys in an enum map must come from a single enum type that is specified, explicitly or implicitly, when the map is created. Enum maps are represented internally as arrays. This representation is extremely compact and efficient.</p> </blockquote></li> </ul>

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