Java MD5, SHA256 Hash

Digest.java

public static String md5(String s) 
{ 
	try 
	{ 
		// Create MD5 Hash 
		MessageDigest digest = MessageDigest.getInstance("MD5"); 
		digest.update(s.getBytes(Charset.forName("UTF-8"))); 
		byte messageDigest[] = digest.digest();

		// Create Hex String
		StringBuffer hexString = new StringBuffer();
		for (int i=0; i<messageDigest.length; i++)
		{
			String hex = Integer.toHexString(0xFF & messageDigest[i]);

			if(hex.length()==1)
			{
				hexString.append('0');
			}
			hexString.append(hex);
		}

		return hexString.toString();

	} 
	catch (NoSuchAlgorithmException e) 
	{
		e.printStackTrace();
	}
	return "";

}

public static String sha256(String s)
{		 
	String result = "";
	try 
	{
		MessageDigest md = MessageDigest.getInstance("SHA-256");
		md.update(s.getBytes(Charset.forName("UTF-8")));

		byte byteData[] = md.digest();

		StringBuffer hexString = new StringBuffer();
		for (int i=0;i<byteData.length;i++) 
		{
			String hex=Integer.toHexString(0xff & byteData[i]);
			if(hex.length()==1) 
			{
				hexString.append('0');
			}
			hexString.append(hex);
		}
		result = hexString.toString();	
	}
	catch (NoSuchAlgorithmException e) 
	{
		e.printStackTrace();
	}

	return result;
}