RIPEMD with Bouncy Castle Cryptography Library

import org.bouncycastle.jce.provider.*;
import org.bouncycastle.util.encoders.Base64;
/**
 * Calculates RIPEMD-160 for an input message and output it in Base64 encoding
 * @author robert sicoie
 *
 */
public class RipeMD {
 
	private static void usage() {
		System.err.println(
"RipeMD <message>\n" +
"Calculates RIPEMD-160 for a given message and outputs it in Base64 encoding");
	}
 
	/**
	 * @param args message The message we want to calculate RIMEMD-160 for.
	 */
	public static void main(String[] args) {
		if (args.length < 1) {
			usage();
			System.exit(1);
		}
		String inputMessage = args[0];
		// Get the message digest generator
		JDKMessageDigest ripeDigest = new JDKMessageDigest.RIPEMD160();
		byte [] input = inputMessage.getBytes();
		byte [] output = ripeDigest.digest(input);
		String outputMessage = new String(Base64.encode(output));
		System.out.print(outputMessage);
	}
}