Examples of java.util.Collection.removeAll()

java.util.Collection.removeAll()
Removes all of this collection's elements that are also contained in the specified collection (optional operation). After this call returns, this collection will contain no elements in common with the specified collection. @param c collection containing elements to be removed from this collection @return true if this collection changed as a result of thecall @throws UnsupportedOperationException if the removeAll methodis not supported by this collection @throws ClassCastException if the types of one or more elementsin this collection are incompatible with the specified collection (optional) @throws NullPointerException if this collection contains one or morenull elements and the specified collection does not support null elements (optional), or if the specified collection is null @see #remove(Object) @see #contains(Object)

    IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
    Object[] projects = root.getProjects();
    new WorkbenchViewerComparator().sort(null, projects);
    projects = new ClosedProjectFilter().filter(null, (Object) null, projects);
    Collection result = new ArrayList(Arrays.asList(projects));
    result.removeAll(fProjectListDialogField.getElements());
    return result;
  }


  @Override
  public void dialogFieldChanged(DialogField field) {

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     * @param holds a collection of the holds to remove
     */
    public synchronized void removeStartHolds(ObjectName objectName, Collection holds) {
        Collection currentHolds = (Collection) startHoldsMap.get(objectName);
        if (currentHolds != null) {
            currentHolds.removeAll(holds);
        }
    }


    /**
     * Removes all of the holds owned by a component.

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            }
            // Split the recipients into two pools.  notRecipients will contain the
            // recipients on the message that the matcher did not return.
            Collection notRecipients = new Vector();
            notRecipients.addAll(mail.getRecipients());
            notRecipients.removeAll(recipients);


            if (recipients.size() == 0) {
                //Everything was not a match... store it in the next spot in the array
                unprocessed[i + 1].add(mail);
                continue;

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      // Figure out which groups to get rid of.  We start off
      // with the full set for which we are already listening,
      // and eliminate any that are in both the new set and the
      // current set.
      Collection toRemove = new HashSet(groups);
      toRemove.removeAll(newGrps);
      // Add new groups before we remove any old groups, because
      // removeGroups will start a new round of multicast requests
      // if the set of groups becomes empty, and we don't want it
      // to do so without reason.
      groups.addAll(toAdd);

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    // optional operation
    public void testCollectionRemoveAll() {
        Collection c = makeCollection();
        assertTrue("Initial Collection is empty.",c.isEmpty());
        try {
            c.removeAll(c);
        } catch(UnsupportedOperationException e) {
            // expected
        } catch(Throwable t) {
            t.printStackTrace();
            fail("Collection.removeAll should only throw UnsupportedOperationException. Found " + t.toString());

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        boolean added = tryToAdd(c,"element1");
        if(added) {
            assertTrue("Collection is not empty.",!c.isEmpty());
            try {
                c.removeAll(c);
                assertTrue("Collection is empty.",c.isEmpty());
            } catch(UnsupportedOperationException e) {
                // expected
            } catch(Throwable t) {
                t.printStackTrace();

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            ancestor.getNode().setResolvedNodes(node.getModuleId(), node.getRootModuleConf(),
                resolved);


            Collection evicted = new HashSet(ancestor.getNode().getEvictedNodes(node.getModuleId(),
                node.getRootModuleConf()));
            evicted.removeAll(resolved);
            evicted.addAll(toevict);
            ancestor.getNode().setEvictedNodes(node.getModuleId(), node.getRootModuleConf(),
                evicted);
            ancestor.getNode().setPendingConflicts(node.getModuleId(), node.getRootModuleConf(),
                Collections.EMPTY_SET);

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            // it's time to update parent resolved and evicted with what was found


            Collection evicted = new HashSet(ancestor.getNode().getEvictedNodes(node.getModuleId(),
                node.getRootModuleConf()));
            toevict.removeAll(resolved);
            evicted.removeAll(resolved);
            evicted.addAll(toevict);
            evicted.add(node.getNode());
            ancestor.getNode().setEvictedNodes(node.getModuleId(), node.getRootModuleConf(),
                evicted);
            ancestor.getNode().setPendingConflicts(node.getModuleId(), node.getRootModuleConf(),

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            }
        }


        // calculate nodes for deselection by removing from currentlySelected nodes
        // those that must be selected.
        currentlySelected.removeAll(newSelectedNodes);


        setSelectState(currentlySelected, false);
        setSelectState(newSelectedNodes, true);
    }

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                    {
                        mdhRemovalSet.add(mdh);
                    }
                }
            }
            metaDataHitCol.removeAll(mdhRemovalSet);
        }


        // apply collection filtering
        if (iv_collectionFilterList.size() > 0)
        {

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