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    <p>A char array in java is nothing more than a <code>String</code> in java. You can use string in switch-cases in Java7, but I don't know the efficiency of the comparisions.</p> <p>Because only the last element of you char array seems to have a meaning, you could do a switch case with it. Something like</p> <pre><code>private static final int VERSION_INDEX = 3; ... char[] version = // get it somehow switch (version[VERSION_INDEX]) { case '5': break; // etc } ... </code></pre> <p><strong>EDIT</strong> More object oriented version.</p> <pre><code> public interface Command { void execute(); } public class Version { private final Integer versionRepresentation; private Version (Integer versionRep) { this.versionRepresentation = versionRep; } public static Version get(char[] version) { return new Version(Integer.valueOf(new String(version, "US-ASCII"))); } @Override public int hashCode() { return this.versionRepresentation.hashCode(); } @Override public boolean equals(Object obj) { if (obj instanceof Version) { Version that = (Version) obj; return that.versionRepresentation.equals(this.versionRepresentation); } return false; } } public class VersionOrientedCommandSet { private final Command EMPTY_COMMAND = new Command() { public void execute() {}}; private final Map&lt;Version, Command&gt; versionOrientedCommands; private class VersionOrientedCommandSet() { this.versionOrientedCommands = new HashMap&lt;Version, Command&gt;(); } public void add(Version version, Command command) { this.versionOrientedCommands.put(version, command); } public void execute(Version version) throw CommandNotFoundException { Command command = this.versionOrientedCommands.get(version); if (command != null) { command.execute(); } else { throw new CommandNotFoundException("No command registered for version " + version); } } } // register you commands to VersionOrientedCommandSet char[] versionChar = // got it from somewhere Version version = Version.get(versionChar); versionOrientedCommandSet.execute(version); </code></pre> <p>lots of code hehe You will have a little cost of warm-up, but if you program is executed multiple times, you will gain efficiency with the map :P</p>
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    1. POCompare int to character constant in Java
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    1. COSo far this is the closest thing as you seem to be the only person comprehending that `0x0005` is not the same as `'0005'`. Unfortunately, what happens when the versions grow to `'0010'`.
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    2. COyeah, I saw problem, but this is the only quick solution I saw to your problem right now. You could process the array of chars and transform it to an int. GOnna edit and post it.
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    3. COWill await your edit to make decision on answer.
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