How to use

synchronizedNavigableMap

method

in

java.util.Collections

 @Override
 protected SortedMap<String, String> create(Entry<String, String>[] entries) {
  NavigableMap<String, String> delegate = populate(new TreeMap<>(), entries);
  return Collections.synchronizedNavigableMap(delegate);
 }
})

classes.add(Collections.synchronizedList(nonRandomAccessList).getClass());
classes.add(Collections.synchronizedMap(Collections.emptyMap()).getClass());
classes.add(Collections.synchronizedNavigableMap(Collections.emptyNavigableMap()).getClass());
classes.add(Collections.synchronizedNavigableSet(Collections.emptyNavigableSet()).getClass());
classes.add(Collections.synchronizedSet(Collections.emptySet()).getClass());

 @Override
 protected SortedMap<String, String> create(Entry<String, String>[] entries) {
  NavigableMap<String, String> delegate = populate(new TreeMap<>(), entries);
  return Collections.synchronizedNavigableMap(delegate);
 }
})

classes.add(Collections.synchronizedList(Collections.emptyList()).getClass());
classes.add(Collections.synchronizedMap(Collections.emptyMap()).getClass());
classes.add(Collections.synchronizedNavigableMap(Collections.emptyNavigableMap()).getClass());
classes.add(Collections.synchronizedNavigableSet(Collections.emptyNavigableSet()).getClass());
classes.add(Collections.synchronizedSet(Collections.emptySet()).getClass());