Example usage for java.util Set addAll

Introduction

In this page you can find the example usage for java.util Set addAll.

Prototype

boolean addAll(Collection<? extends E> c);

Source Link

Document

Adds all of the elements in the specified collection to this set if they're not already present (optional operation).

Usage

From source file:com.ignorelist.kassandra.steam.scraper.LibraryScanner.java

public static Set<Long> findGames(Iterable<Path> paths) throws IOException {
    Set<Long> gameIds = new HashSet<>();
    for (Path p : paths) {
        gameIds.addAll(findGames(p));
    }// w  ww . j a  v a2 s .com
    return gameIds;
}

From source file:Main.java

/**
 * Returns a {@link Collection} containing the intersection
 * of the given {@link Collection}s./*from  www  .  j a  v  a2  s.  c o  m*/
 * <p>
 * The cardinality of each element in the returned {@link Collection}
 * will be equal to the minimum of the cardinality of that element
 * in the two given {@link Collection}s.
 *
 * @param a The first collection
 * @param b The second collection
 * @see Collection#retainAll
 * @return  The intersection of a and b, never null
 */
public static <E> Collection<E> intersection(final Collection<E> a, final Collection<E> b) {
    ArrayList<E> list = new ArrayList<E>();
    Map<E, Integer> mapa = getCardinalityMap(a);
    Map<E, Integer> mapb = getCardinalityMap(b);
    Set<E> elts = new HashSet<E>(a);
    elts.addAll(b);
    for (E obj : elts) {
        for (int i = 0, m = Math.min(getFreq(obj, mapa), getFreq(obj, mapb)); i < m; i++) {
            list.add(obj);
        }
    }
    return list;
}

From source file:Main.java

/**
 * Thread safe method to initialize sets
 * @param initSet/*from www .  j av  a2 s.  co  m*/
 * @return an initialized set of the desired object type
 */
public static synchronized <T> Set<T> initializeSets(Set<T> initSet) {
    if (initSet == null) {
        return new HashSet<T>();
    } else {
        initSet.addAll(initSet);
        return initSet;
    }
}

From source file:com.memetix.gun4j.expand.UrlExpander.java

public static Map<String, String> expand(final List<String> shortUrls) throws Exception {
    Set<String> urlSet = new HashSet<String>();
    urlSet.addAll(shortUrls);
    return expand(urlSet);
}

From source file:Main.java

/**
 * Returns the unique union of the given lists
 *//*from w w  w .j a  v a2s  . c o m*/
public static <T> Set<T> setUnion(Collection<T>... lists) {
    Set<T> union = new HashSet<T>(lists[0].size() * 2);

    for (int x = 0; x < lists.length; x++) {
        union.addAll(lists[x]);
    }
    return union;
}

From source file:Main.java

/**
 * Bestimmt die Vereinigung zweier Mengen.
 * //from ww w .  j  a  v a 2 s .  com
 * @param <T>
 *            der Typ der Mengen.
 * @param set1
 *            die erste Menge.
 * @param set2
 *            die zweite Menge.
 * @return die Mengenvereinigung.
 */
public static <T> Set<T> union(final Set<T> set1, final Set<T> set2) {
    final Set<T> result = new HashSet<T>();
    result.addAll(set1);
    result.addAll(set2);

    return result;
}

From source file:Main.java

/**
 * Converts the given array of elements to a set.
 *
 * @param elements The elements/*from w  w  w.j  a v  a 2s . c  o  m*/
 * @return The elements as a set, empty if elements was null
 */
public static <T> Set<T> asSet(T... elements) {
    Set<T> result = new HashSet<T>();
    if (elements == null) {
        return result;
    }
    result.addAll(asList(elements));
    return result;
}

From source file:Main.java

/**
 * Return a new Set with elements that are in the first and second passed collection.
 * If one set is null, an empty Set will be returned.
 * @param  <T>    Type of set/*  ww w. j  a  v  a  2  s . c  om*/
 * @param  first  First set
 * @param  second Second set
 *
 * @return a new set (depending on input type) with elements in first and second
 */
static <T> Set<T> intersection(Set<T> first, Set<T> second) {
    Set<T> result = new HashSet<T>();
    if ((first != null) && (second != null)) {
        result.addAll(first);
        //            result.retainAll(second);
        Iterator<T> iter = result.iterator();
        boolean found;
        while (iter.hasNext()) {
            T item = iter.next();
            found = false;
            for (T s : second) {
                if (s.equals(item))
                    found = true;
            }
            if (!found)
                iter.remove();
        }
    }

    return result;
}

From source file:com.haulmont.mp2xls.MessagePropertiesProcessor.java

private static Set<String> getLanguages(String optValue) {
    Set<String> languages = new HashSet<>();
    if (StringUtils.isNotEmpty(optValue)) {
        languages.addAll(Arrays.asList(optValue.split(",")));
    }//w w w  . ja  v a2s . c  om
    return languages;
}

From source file:Main.java

/**
 * This method returns a new HashSet which is the intersection of the two Set parameters, based on {@link Object#equals(Object) equality}
 * of their elements./*from w  w  w . jav a 2s  .c  o m*/
 * Any references in the resultant set will be to elements within set1.
 * 
 * @return a new HashSet whose values represent the intersection of the two Sets.
 */
public static <T> Set<T> intersect(Set<? extends T> set1, Set<? extends T> set2) {
    if (set1 == null || set1.isEmpty() || set2 == null || set2.isEmpty()) {
        return Collections.emptySet();
    }

    Set<T> result = new HashSet<T>();
    result.addAll(set1);

    result.retainAll(set2);

    return result;
}