Examples of java.util.Set.removeAll()

java.util.Set.removeAll()
Removes from this set all of its elements that are contained in the specified collection (optional operation). If the specified collection is also a set, this operation effectively modifies this set so that its value is the asymmetric set difference of the two sets. @param c collection containing elements to be removed from this set @return true if this set changed as a result of the call @throws UnsupportedOperationException if the removeAll operationis not supported by this set @throws ClassCastException if the class of an element of this setis incompatible with the specified collection (optional) @throws NullPointerException if this set contains a null element and thespecified collection does not permit null elements (optional), or if the specified collection is null @see #remove(Object) @see #contains(Object)

    return referreringObjects;
  }


  public Set getGarbage(Class valueClazz) {
    Set orphanedValues = new HashSet(get(valueClazz));
    orphanedValues.removeAll(Reflections.getReferredObjects(
        get(Object.class), valueClazz));
    return orphanedValues;
  }


}

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            Hashtable oldFieldMap = makeFieldMap(oldItems);
            Hashtable newFieldMap = makeFieldMap(newItems);


            Set missingInNew = new HashSet(oldFieldMap.keySet());
            missingInNew.removeAll(newFieldMap.keySet());


            Set missingInOld = new HashSet(newFieldMap.keySet());
            missingInOld.removeAll(oldFieldMap.keySet());


            //            dump("missingInNew", missingInNew);

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            Set missingInNew = new HashSet(oldFieldMap.keySet());
            missingInNew.removeAll(newFieldMap.keySet());


            Set missingInOld = new HashSet(newFieldMap.keySet());
            missingInOld.removeAll(oldFieldMap.keySet());


            //            dump("missingInNew", missingInNew);
            //            dump("missingInOld", missingInOld);
            //            dump("newFieldMap.keySet()", newFieldMap.keySet());
            //            dump("oldFieldMap.keySet()", oldFieldMap.keySet());

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      {
         lock.readLock().lock();
         try
         {
            Set state = getCurrentState(true);
            return state.removeAll(c);
         }
         finally
         {
            lock.readLock().unlock();
         }

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            log.debug("***** Webflow stack: START *****");


            for (int i = 0; i < webflowStack.size(); i++) {
                Webflow webflow = (Webflow) webflowStack.elementAt(i);
                log.debug("Webflow " + webflow.getName() + " owns " + webflow.getOwnedObjectSet());
                sessionSet.removeAll(webflow.getOwnedObjectSet());


                Stack pageStack = webflow.getPageStack();


                for (int j = 0; j < pageStack.size(); j++) {
                    Page page = (Page) pageStack.get(j);

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                Stack pageStack = webflow.getPageStack();


                for (int j = 0; j < pageStack.size(); j++) {
                    Page page = (Page) pageStack.get(j);
                    log.debug("\tpage " + page.getUrl() + " owns " + page.getOwnedObjectSet());
                    sessionSet.removeAll(page.getOwnedObjectSet());
                }
            }


            log.debug("Attribute container owns " + sessionSet);

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                    buffer2.append("</b> owns: ");
                    buffer2.append(page.getOwnedObjectSet().toString());
                    buffer2.append("\n");
                    buffer2.append("<tr><td>\n");


                    sessionSet.removeAll(page.getOwnedObjectSet());
                }


                buffer2.append("</table>\n");


                buffer2.append("Webflow <b>");

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                buffer2.append("\n");
                buffer2.append("</tr></td>\n");
                buffer2.append("</table>\n");
                buffer2.append("</tr></td>\n");


                sessionSet.removeAll(webflow.getOwnedObjectSet());
            }


            int emptyHeight = this.height - (count * 33);


            if (emptyHeight > 0) {

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          final Set usesPkgs = bpInfo.getPackagesReferencedFromPackage(pkgName);
          final String usesValue = (String) expEntry.get("uses");
          final Set uPkgsMan = new TreeSet
            (Arrays.asList(Util.splitwords(usesValue, ", \t", '"')));
          final Set uPkgsMis = new TreeSet(usesPkgs);
          uPkgsMis.removeAll(uPkgsMan);
          if (0<uPkgsMis.size()) {
            final String msg = "The package '"+pkgName
              +"' in the Export-Package"
              +" manifest header has a usage directive with value '"
              +usesValue +"', but the following packages are are also used: '"

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            if (failOnExports) {
              throw new BuildException(msg, getLocation());
            }
          }
          final Set uPkgsExtra = new TreeSet(uPkgsMan);
          uPkgsExtra.removeAll(usesPkgs);
          if (0<uPkgsExtra.size()) {
            final String msg = "The package '"+pkgName
              +"' in the Export-Package"
              +" manifest header has a usage directive with value '" +usesValue
              +"', that contains the following unexpected (unused) packages: '"

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