[JAVA] Få MD5 ur en text-sträng?

import java.security.*;

/**
 * PasswdGen(erator) generates any given string to a MD5-scrambled 'readable hex' string
 * 
 * @author Sebastian Holmqvist (byteArrayToHexString() written by Jeff Boyle)
 * @date July 5, 2005
 */

public class PasswdGen
{
    private String str;
    private byte[] result;

    /* Scrambles given string to a MD5 binary-hex array */
    public PasswdGen(String string)
    {
        try
        {
            str = string;
            byte[] data = str.getBytes("UTF-8");
            MessageDigest digester = MessageDigest.getInstance("MD5");
            result = digester.digest(data);
            
            byteArrayToHexString(result);
        }
        catch(Exception e)
        {
            System.out.println("Error: "+e); 
        }
    }
    
    /* Turns MD5-scrambled byte array into a 'readable hex' string */
    public String byteArrayToHexString(byte in[])
    {
        byte ch = 0x00;

        if (in == null || in.length <= 0)
            return null;
    
        String pseudo[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
    
        StringBuffer out = new StringBuffer(in.length * 2);
        
        int i = 0;
        while (i < in.length)
        {
            ch = (byte) (in[i] & 0xF0); // Strip off high nibble
            ch = (byte) (ch >>> 4); // shift the bits down
            ch = (byte) (ch & 0x0F); // must do this is high order bit is on!
            out.append(pseudo[ (int) ch]); // convert the nibble to a String Character
            ch = (byte) (in[i] & 0x0F); // Strip off low nibble 
            out.append(pseudo[ (int) ch]); // convert the nibble to a String Character
    
            i++;
        }
    
        String rslt = new String(out);
    
        System.out.println(rslt);
        return rslt;
    }    
}