FULL PRODUCT VERSION :
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Darwin spotify-mzeo-osx.local 14.1.0 Darwin Kernel Version 14.1.0: Thu Feb 26 19:26:47 PST 2015; root:xnu-2782.10.73~1/RELEASE_X86_64 x86_64

A DESCRIPTION OF THE PROBLEM :
Uri:s are not parsed according to RFC 2396 BNF.

Appendix A (Collected BNF for URI) of RFC 2396 has authority being optional (server is optional empty). net_path should parse "//" as server = "" without a abs_path part.





STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run:

import java.net.URI;
class main {
  public static void main(final String[] args) throws Exception {
    new URI("s://");
  }
}


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Not throw exception.

ACTUAL -
Throws java.net.URISyntaxException.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.net.URISyntaxException: Expected authority at index 4: s://
at java.net.URI$Parser.fail(URI.java:2848)
at java.net.URI$Parser.failExpecting(URI.java:2854)
at java.net.URI$Parser.parseHierarchical(URI.java:3102)
at java.net.URI$Parser.parse(URI.java:3053)
at java.net.URI.<init>(URI.java:588)
at main.main(main.java:4)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.net.URI;
class main {
  public static void main(final String[] args) throws Exception {
    new URI("s://");
  }
}


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Treat schema as path.