javax.security.auth.kerberos.KerberosKey::getAlgorithm has

     * Returns the standard algorithm name for this key. For
     * example, "DES" would indicate that this key is a DES key.
     * See Appendix A in the <a href=
     * "../../../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">
     * Java Cryptography Architecture API Specification &amp; Reference
     * </a>
     * for information about standard algorithm names.

CryptoSpec.html#AppA points the Standard Names doc. However, the algorithm names for a KerberosKey is not exactly the same as, say, Cipher algorithm names. For example, AES128 and AES256 are two different Kerberos etypes.