public class CopyOnWriteArraySet<E>
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A java.util.Set that uses an internal CopyOnWriteArrayList for all of its operations. Thus, it shares the same basic properties:

Sample Usage. The following code sketch uses a copy-on-write set to maintain a set of Handler objects that perform some action upon state updates.

 class Handler { void handle(); ... 

 class X {
   private final CopyOnWriteArraySet handlers
     = new CopyOnWriteArraySet();
   public void addHandler(Handler h) { handlers.add(h); }

   private long internalState;
   private synchronized void changeState() { internalState = ...; }

   public void update() {
     for (Handler handler : handlers)

This class is a member of the Java Collections Framework.

extends AbstractSet<E> implements Serializable

<E>    the type of elements held in this collection

See also:

Since:  1.5