--- a/src/java.base/share/classes/java/security/cert/X509Certificate.java	Thu Oct 17 20:27:44 2019 +0100
+++ b/src/java.base/share/classes/java/security/cert/X509Certificate.java	Thu Oct 17 20:53:35 2019 +0100
@@ -108,6 +108,7 @@
 public abstract class X509Certificate extends Certificate
 implements X509Extension {
 
+    @java.io.Serial
     private static final long serialVersionUID = -2491127588187038216L;
 
     private transient X500Principal subjectX500Principal, issuerX500Principal;
@@ -140,8 +141,8 @@
      *     generalTime    GeneralizedTime }
      * </pre>
      *
-     * @exception CertificateExpiredException if the certificate has expired.
-     * @exception CertificateNotYetValidException if the certificate is not
+     * @throws    CertificateExpiredException if the certificate has expired.
+     * @throws    CertificateNotYetValidException if the certificate is not
      * yet valid.
      */
     public abstract void checkValidity()
@@ -155,9 +156,9 @@
      * @param date the Date to check against to see if this certificate
      *        is valid at that date/time.
      *
-     * @exception CertificateExpiredException if the certificate has expired
+     * @throws    CertificateExpiredException if the certificate has expired
      * with respect to the {@code date} supplied.
-     * @exception CertificateNotYetValidException if the certificate is not
+     * @throws    CertificateNotYetValidException if the certificate is not
      * yet valid with respect to the {@code date} supplied.
      *
      * @see #checkValidity()
@@ -333,7 +334,7 @@
      * This can be used to verify the signature independently.
      *
      * @return the DER-encoded certificate information.
-     * @exception CertificateEncodingException if an encoding error occurs.
+     * @throws    CertificateEncodingException if an encoding error occurs.
      */
     public abstract byte[] getTBSCertificate()
         throws CertificateEncodingException;
@@ -665,12 +666,12 @@
      * @param key the PublicKey used to carry out the verification.
      * @param sigProvider the signature provider.
      *
-     * @exception NoSuchAlgorithmException on unsupported signature
+     * @throws    NoSuchAlgorithmException on unsupported signature
      * algorithms.
-     * @exception InvalidKeyException on incorrect key.
-     * @exception SignatureException on signature errors.
-     * @exception CertificateException on encoding errors.
-     * @exception UnsupportedOperationException if the method is not supported
+     * @throws    InvalidKeyException on incorrect key.
+     * @throws    SignatureException on signature errors.
+     * @throws    CertificateException on encoding errors.
+     * @throws    UnsupportedOperationException if the method is not supported
      * @since 1.8
      */
     public void verify(PublicKey key, Provider sigProvider)