MD5 Java

MD5Utils.java

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {
    public static String convert(String s) {
        try {
            // Create MD5 Hash
            MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.update(s.getBytes());
            byte messageDigest[] = digest.digest();

            // Create Hex String
            StringBuilder hexString = new StringBuilder();
            for (byte b : messageDigest) {
                hexString.append(Integer.toHexString(0xFF & b));
            }
            return hexString.toString();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }
}

bug: need to replace with hexString.append(String.format("%02x", b)); on the 15 line of code.