A DESCRIPTION OF THE PROBLEM :
In Summary JavaDoc ConcurrentNavigableMap for JP localized version.

NavigableMap's link target is ConcurrentMap, and ConcurrentMap's link target is NavigableMap.
It's reverse the link target.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I wish to fix correct link target NavigableMap and ConcurrentMap.

NavigableMap link target is http://docs.oracle.com/javase/jp/8/docs/api/java/util/NavigableMap.html.
ConcurrentMap link target is http://docs.oracle.com/javase/jp/8/docs/api/java/util/concurrent/ConcurrentMap.html.
ACTUAL -
ConcurrentMap link target is http://docs.oracle.com/javase/jp/8/docs/api/java/util/NavigableMap.html.
NavigableMap link target is http://docs.oracle.com/javase/jp/8/docs/api/java/util/concurrent/ConcurrentMap.html.

URL OF FAULTY DOCUMENTATION :
http://docs.oracle.com/javase/jp/8/docs/api/java/util/concurrent/ConcurrentNavigableMap.html