hg: jdk/sandbox: 8198810: URLClassLoader does not specify behavior when URL array contains null

[chris.hegarty at oracle.com]

Changeset: 0a93645a57f1
Author:    martin
Date:      2018-03-01 19:01 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/0a93645a57f1

8198810: URLClassLoader does not specify behavior when URL array contains null
Reviewed-by: alanb, darcy, dholmes

! src/java.base/share/classes/java/net/URLClassLoader.java
! test/jdk/java/net/URLClassLoader/NullURLTest.java