A DESCRIPTION OF THE PROBLEM :
The documentation of the URI identities is wrong. It applies to the JAVA 7 documentation as well (others not tested). The amount of parameters in the "in all cases" example doesn't match the constructor. User-info is a component of authority and is superfluous. If removed it matches the constructor again.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
in all cases,

     new URI(u.getScheme(),
             u.getAuthority(),
             u.getPath(), u.getQuery(),
             u.getFragment())
     .equals(u)
ACTUAL -
in all cases,

     new URI(u.getScheme(),
             u.getUserInfo(), u.getAuthority(),
             u.getPath(), u.getQuery(),
             u.getFragment())
     .equals(u)

URL OF FAULTY DOCUMENTATION :
https://docs.oracle.com/javase/8/docs/api/java/net/URI.html