public class Charset {

    public Charset() {}
    
    /**
     * @param args the command line arguments
     *  args[0]: charset name which is tested in this class
     *  example:
     *      java -classpath . Charset eucJP
     */
    public static void main(String[] args) {
        // nio
        java.lang.String charset = args[0];
        System.out.println("charsetName = " + charset);
        if(java.nio.charset.Charset.isSupported(charset)) {
            java.nio.charset.Charset cs = java.nio.charset.Charset.forName(charset);
            System.out.println("Charset.displayName() = " + cs.displayName());
            System.out.println("Charset.name() = " + cs.name());
            System.out.println("is registered? -> " + cs.isRegistered());
            System.out.println("Charset.toString() = " + cs.toString());
            System.out.println("Charset.aliases() = " + cs.aliases());
        } else {
            System.out.println(charset + " is not supported.");
        }
    }
}