How to use

checkedSortedMap

method

in

java.util.Collections

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

classes.add(Collections.checkedQueue(new LinkedList<>(), Void.class).getClass());
classes.add(Collections.checkedSet(Collections.emptySet(), Void.class).getClass());
classes.add(Collections.checkedSortedMap(Collections.emptySortedMap(), Void.class, Void.class).getClass());
classes.add(Collections.checkedSortedSet(Collections.emptySortedSet(), Void.class).getClass());

PojoWithObjectMapFields fill()
{
  TreeMap<String, String> tm = new TreeMap<String, String>();
  tm.put("foo", "bar");
  EnumMap<GuitarPickup, Size> em = new EnumMap<GuitarPickup, Size>(
      GuitarPickup.class);
  em.put(GuitarPickup.CONTACT, Size.SMALL);
  emptyMap = Collections.emptyMap();
  singletonMap = Collections.singletonMap("key", "value");
  unmodifiableMap = Collections.unmodifiableMap(Collections
      .emptyMap());
  unmodifiableSortedMap = Collections.unmodifiableSortedMap(tm);
  synchronizedMap = Collections.synchronizedMap(em);
  synchronizedSortedMap = Collections.synchronizedSortedMap(tm);
  checkedMap = Collections.checkedMap(em, GuitarPickup.class,
      Size.class);
  checkedSortedMap = Collections.checkedSortedMap(tm, String.class,
      String.class);
  return this;
}

public SortedMap<K,V> subMap(K fromKey, K toKey) {
  return checkedSortedMap(sm.subMap(fromKey, toKey),
              keyType, valueType);
}
public SortedMap<K,V> headMap(K toKey) {

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

public SortedMap<K,V> subMap(K fromKey, K toKey) {
  return checkedSortedMap(sm.subMap(fromKey, toKey),
              keyType, valueType);
}
public SortedMap<K,V> headMap(K toKey) {

public SortedMap<K,V> headMap(K toKey) {
  return checkedSortedMap(sm.headMap(toKey), keyType, valueType);
}
public SortedMap<K,V> tailMap(K fromKey) {

  public SortedMap<K,V> tailMap(K fromKey) {
    return checkedSortedMap(sm.tailMap(fromKey), keyType, valueType);
  }
}

  public SortedMap<K,V> tailMap(K fromKey) {
    return checkedSortedMap(sm.tailMap(fromKey), keyType, valueType);
  }
}

public SortedMap<K,V> headMap(K toKey) {
  return checkedSortedMap(sm.headMap(toKey), keyType, valueType);
}
public SortedMap<K,V> tailMap(K fromKey) {

classes.add(Collections.checkedQueue(new LinkedList<>(), Void.class).getClass());
classes.add(Collections.checkedSet(Collections.emptySet(), Void.class).getClass());
classes.add(Collections.checkedSortedMap(Collections.emptySortedMap(), Void.class, Void.class).getClass());
classes.add(Collections.checkedSortedSet(Collections.emptySortedSet(), Void.class).getClass());