package org.bouncycastle.util.encoders;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.OutputStream;public class Hex{    private static final Encoder encoder = new HexEncoder();        /**     * encode the input data producing a Hex encoded byte array.     *     * @return a byte array containing the Hex encoded data.     */    public static byte[] encode(        byte[]    data)    {        return encode(data, 0, data.length);    }        /**     * encode the input data producing a Hex encoded byte array.     *     * @return a byte array containing the Hex encoded data.     */    public static byte[] encode(        byte[]    data,        int       off,        int       length)    {        ByteArrayOutputStream    bOut = new ByteArrayOutputStream();                try        {            encoder.encode(data, off, length, bOut);        }        catch (IOException e)        {            throw new RuntimeException("exception encoding Hex string: " + e);        }                return bOut.toByteArray();    }    /**     * Hex encode the byte data writing it to the given output stream.     *     * @return the number of bytes produced.     */    public static int encode(        byte[]         data,        OutputStream   out)        throws IOException    {        return encoder.encode(data, 0, data.length, out);    }        /**     * Hex encode the byte data writing it to the given output stream.     *     * @return the number of bytes produced.     */    public static int encode(        byte[]         data,        int            off,        int            length,        OutputStream   out)        throws IOException    {        return encoder.encode(data, 0, data.length, out);    }        /**     * decode the Hex encoded input data. It is assumed the input data is valid.     *     * @return a byte array representing the decoded data.     */    public static byte[] decode(        byte[]    data)    {        ByteArrayOutputStream    bOut = new ByteArrayOutputStream();                try        {            encoder.decode(data, 0, data.length, bOut);        }        catch (IOException e)        {            throw new RuntimeException("exception decoding Hex string: " + e);        }                return bOut.toByteArray();    }        /**     * decode the Hex encoded String data - whitespace will be ignored.     *     * @return a byte array representing the decoded data.     */    public static byte[] decode(        String    data)    {        ByteArrayOutputStream    bOut = new ByteArrayOutputStream();                try        {            encoder.decode(data, bOut);        }        catch (IOException e)        {            throw new RuntimeException("exception decoding Hex string: " + e);        }                return bOut.toByteArray();    }        /**     * decode the Hex encoded String data writing it to the given output stream,     * whitespace characters will be ignored.     *     * @return the number of bytes produced.     */    public static int decode(        String          data,        OutputStream    out)        throws IOException    {        return encoder.decode(data, out);    }}