8296143: CertAttrSet's set/get mechanism is not type-safe

Reviewed-by: mullan

Author: wangweij

src/java.base/share/classes/java/security/cert/CertificateRevokedException.java

@@ -155,7 +155,7 @@ public Date getInvalidityDate() {
             return null;
         } else {
             try {
-                Date invalidity = InvalidityDateExtension.toImpl(ext).get("DATE");
+                Date invalidity = InvalidityDateExtension.toImpl(ext).getDate();
                 return new Date(invalidity.getTime());
             } catch (IOException ioe) {
                 return null;

src/java.base/share/classes/java/security/cert/X509CRLSelector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -323,7 +323,7 @@ private static HashSet<Object> cloneAndCheckIssuerNames(Collection<?> names)
             else
                 namesCopy.add(nameObject);
         }
-        return(namesCopy);
+        return namesCopy;
     }
 
     /**
@@ -630,7 +630,7 @@ public boolean match(CRL crl) {
                 byte[] encoded = in.getOctetString();
                 CRLNumberExtension crlNumExt =
                     new CRLNumberExtension(Boolean.FALSE, encoded);
-                crlNum = crlNumExt.get(CRLNumberExtension.NUMBER);
+                crlNum = crlNumExt.getCrlNumber();
             } catch (IOException ex) {
                 if (debug != null) {
                     debug.println("X509CRLSelector.match: exception in "