src/java.base/share/classes/javax/security/auth/x500/X500PrivateCredential.java

@@ -34,10 +34,11 @@
  * It associates an X.509 certificate, corresponding private key and the
  * KeyStore alias used to reference that exact key pair in the KeyStore.
  * This enables looking up the private credentials for an X.500 principal
  * in a subject.
  *
+ * @since 1.4
  */
 public final class X500PrivateCredential implements Destroyable {
     private X509Certificate cert;
     private PrivateKey key;
     private String alias;