How to use

checkedCollection

method

in

java.util.Collections

 @SuppressWarnings("unchecked") // Just for this one statement
Collection<String> keys = Collections.checkedCollection(map.keySet(),
                            String.class);

// Now this statement is fully generic with no warnings
SortedSet<String> s = new TreeSet<String>(keys);

List<Void> nonRandomAccessList = new LinkedList<>();
classes.add(Collections.checkedCollection(randomAccessList, Void.class).getClass());
classes.add(Collections.checkedCollection(nonRandomAccessList, Void.class).getClass());
classes.add(Collections.checkedList(randomAccessList, Void.class).getClass());
classes.add(Collections.checkedList(nonRandomAccessList, Void.class).getClass());

    .endsWith("RandomAccessList"));
checkedCollection = Collections.checkedCollection(newList("eight"),
    String.class); // no equals impl
checkedSet = Collections.checkedSet(es, Size.class);

Collection<String> c = Collections.checkedCollection(
    new HashSet<String>(), String.class);

/**
Create a checked Collection<String>, first verifying that all elements
are in fact String.
@param c the Collection
@throws ClassCastException
 */
public static <T> Collection<T> checkedCollection(final Collection<?> c, final Class<T> theClass)
{
  final Collection<T> cc = checkCollection(c, theClass);
  return Collections.checkedCollection(cc, theClass);
}

/**
Create a checked Collection<String>, first verifying that all elements
are in fact String.
@param c the Collection
@throws ClassCastException
 */
public static <T> Collection<T> checkedCollection(final Collection<?> c, final Class<T> theClass)
{
  final Collection<T> cc = checkCollection(c, theClass);
  return Collections.checkedCollection(cc, theClass);
}

@Override
protected final void doUpdate(Set<Parcel> onMap, long time) {
 final Collection<Parcel> inCargo = Collections.checkedCollection(
  pdpModel.get().getContents(vehicle.get()), Parcel.class);
 parcels.clear();
 parcels.addAll(onMap);
 parcels.addAll(onMap);
 parcels.addAll(inCargo);
 updateCurrent();
}

public void update() {
  dateLabel.setText(formatDate());
  for (DateSwitcherListener listener : Collections.checkedCollection(
      listeners, DateSwitcherListener.class)) {
    listener.dateSwitched(this, calendar.getTime());
  }
  dateLabel.requestFocusInWindow();
}

classes.add(Collections.checkedCollection(Collections.emptyList(), Void.class).getClass());
classes.add(Collections.checkedList(Collections.emptyList(), Void.class).getClass());
classes.add(Collections.checkedMap(Collections.emptyMap(), Void.class, Void.class).getClass());

if (type == null) throw new NullPointerException("type cannot be null");
try {
  Collection typeCheckedView = Collections.checkedCollection(destination, type);
  typeCheckedView.addAll(source);
} catch (ClassCastException ex){

crls.addAll(Collections.checkedCollection(storeCRLs, X509CRL.class));