hg: jdk/submit: 8242208: Use Method.getParameterCount where applicable

[claes.redestad at oracle.com]

Changeset: 14f909934eb2
Author:    redestad
Date:      2020-04-06 13:46 +0200
URL:       https://hg.openjdk.java.net/jdk/submit/rev/14f909934eb2

8242208: Use Method.getParameterCount where applicable
Reviewed-by: redestad, chegar
Contributed-by: christoph.dreis at freenet.de

! src/java.base/share/classes/java/lang/invoke/MethodHandleProxies.java
! src/java.base/share/classes/java/lang/reflect/Executable.java
! src/java.base/share/classes/sun/reflect/annotation/AnnotationType.java