hg: jdk/sandbox: 8223457: java.net.ServerSocket protected constructor should throw NPE if impl null

[chris.hegarty at oracle.com]

Changeset: ba74d2de9a01
Author:    michaelm
Date:      2019-05-07 15:39 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/ba74d2de9a01

8223457: java.net.ServerSocket protected constructor should throw NPE if impl null
Reviewed-by: dfuchs

! src/java.base/share/classes/java/net/ServerSocket.java
+ test/jdk/java/net/ServerSocket/NullConstructor.java