8258804: Collection.toArray() should use empty array

Reviewed-by: mullan

Author: XueleiFan

src/java.base/share/classes/sun/security/ssl/SSLContextImpl.java

@@ -851,7 +851,7 @@ private static List<ProtocolVersion> customizedProtocols(
             } else {
                 // Use the customized TLS protocols.
                 candidates =
-                    refactored.toArray(new ProtocolVersion[refactored.size()]);
+                    refactored.toArray(new ProtocolVersion[0]);
             }
 
             return getAvailableProtocols(candidates);

src/java.base/share/classes/sun/security/ssl/SunX509KeyManagerImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2020, 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
@@ -424,6 +424,6 @@ private static X500Principal[] convertPrincipals(Principal[] principals) {
                 }
             }
         }
-        return list.toArray(new X500Principal[list.size()]);
+        return list.toArray(new X500Principal[0]);
     }
 }