MD5 encryption Java class

md5.java

import java.security.MessageDigest;
 
public class MD5
{
static byte[] digest;
 
public MD5() {
}
     
public static String getHash(String stringToHash)
{
  // hexString is used to store the hash
  StringBuffer hexString = new StringBuffer();
  // Get a byte array of the String to be hashed
  byte[] buffer = stringToHash.getBytes();
  try
  {
    // Get and instance of the MD5 MessageDigest
    MessageDigest alg = MessageDigest.getInstance("MD5");
    // Make sure the Digest is clear
    alg.reset();
    // Populate the Digest with the byte array
    alg.update(buffer);
    // Create the MD5 Hash
    digest = alg.digest();
    // Now we need to pull out each char of the byte array into the StringBuffer
  }
  catch(Exception e)
  {
    // Need to catch some exceptions
  }
  // Return the hex hash value as a String
  return asHex(digest);     
}
 
private static String asHex (byte hash[]) {
  StringBuffer buf = new StringBuffer(hash.length * 2);
  int i;
  for (i = 0; i < hash.length; i++) {
    if (((int) hash[i] & 0xff) < 0x10) 
      buf.append("0");
      buf.append(Long.toString((int) hash[i] & 0xff, 16));
  }
  return buf.toString();
  }
}

// Usage: String hash = MD5.getHash("somepassword");
//        INSERT INTO table VALUES (MD5('yourstring'));