The current default implementation of openConnection(URL,Proxy) simply throws UnsupportedOperationException. Pedantically, this violates its own specification, since it does not throw IllegalArgumentException when passed a null value.
To resolve this, the default implementation should be updated and specified. Trivially, perform null argument checking, and subsequently throw UnsupportedOperationException ( since the URL stream handler implementation can realistically do nothing more ). Webrev: https://cr.openjdk.java.net/~chegar/8224973/webrev.00/ CSR: https://bugs.openjdk.java.net/browse/JDK-8225047 -Chris. P.S. There are a number of these minor API / default implementation issues in the java.net package, resulting from evolution over the years.
